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    Home » Whole Food Recipes » Best Desserts

    April 28, 2016 | By Jami

    Peanut Butter Chocolate Celebration Cake

    Jump to Recipe

    This amazing peanut butter-chocolate celebration cake will make any occasion special. Create a bakery-worthy cake with this easy tutorial and prepare for rave reviews!

    Think you can't make a specialty bakery-style cake? You can!! And not just any cake - when you want a special cake for a party or birthday, this candy-bar-like peanut butter chocolate cake will make people

    • bow down to your culinary skills
    • lick their plates clean and eye any leftovers
    • talk about it to their friends who will immediately let you know when their birthday is
    • ooh and ahh and you will not hear the end of it

    You can even sell it (if your brother has a catering business) for big bucks- and have the customer request it year after year.

    Peanut Butter Chocolate Celebration Cake slice

    Truly. I have been making this cake for 10+ years (adapting it from an old Family Circle magazine cut-out) and have experienced all of that. And you can, too. There are a number of steps and time involved, of course, (which is why it's a 'celebration' cake!) but it's not hard and doesn't involve a lot of cake decorating know-how to be a show-stopper. In fact, the brittle decoration is the easiest brittle you'll every make!

    This is a cake where you can show your love to the recipient in a big way. It's so delicious and gorgeous and I really want you to make it, so I'm breaking it down with lots of pictures so you will be able to love on your families and friends with this cake!

    (PS, don't let the length of the tutorial part scare you - I'm just sharing the tips I've learned to make it easier - scroll straight down to find the printable recipe if you'd like.)

    How to Make Peanut Butter Chocolate Celebration Cake

    Step 1: Chocolate Cake

    Preparing pans for peanut butter-chocolate celebration cake

    • Prepare 9-inch pans by coating with butter and then lining with wax paper (or parchment, but I save parchment for baking where I can't use wax paper).
    • To line, set a pan on top of two pieces of wax paper, draw around the edge with a pen and then cut just inside the pen mark to fit in the bottoms.
    • Give the tops of the paper a once-over with the buttered brush. This ensures the cakes will easily release from the pans.

    Peanut Butter-Chocolate celebration cake batter

    Cake Tips:

    • Mix the dry ingredients and add alternately with sour cream. I don't always do this, but it's important in cake recipes like this since it helps create a good texture.
    • Beat just until the ingredients are blended - I've learned that over-beating makes cakes get those little volcano-like rises in the centers.

    Spread evenly between the prepared pans, smoothing the tops with a spatula. As you can see above, the batter is thick, more like a brownie batter because this is a moist cake.

    Bake and cool in pans for 5 minutes, then invert on cooling racks and remove wax paper before inverting again on another rack to cooling completely right side up.

    Step 2: Peanut Brittle Topping

    Easy peanut brittle for Peanut Butter-Chocolate Celebration Cake

    Note: if you have a fear of making candy and candy thermometers (my hand is raised...) this does NOT use a candy thermometer. There are some simple steps and if you follow them, the brittle will turn out, I promise! I've only had it not harden once in all the times I've made it and I just didn't cook it long enough.

    Brittle Tips:

    • Add all ingredients except peanuts and simmer without stirring over medium heat.
    • Use a silicone liner for easiest removal. Grease a piece of foil if you don't have silicone (foil alone will stick and parchment doesn't work as well).
    • When mixture is simmering (a very low boil), cover and continue to simmer 3 minutes. Remove cover and continue to cook until syrup is pale amber, about 10 to 12 minutes. The picture top left shows the pale amber color after about 10 minutes (sometimes 12). Add peanuts and stir gently.
    • Cook, stirring, just until the syrup is a deep amber like in the picture top right above. I should've timed it, it's only a few minutes, but different each time.
    • Biggest tip: don't be tempted to do other things in the kitchen for the next few minutes or you will have a burned brittle. Remember when I said I've only had it not harden one time? Well, I have had it burn a number of times, so take it from me - pay attention!
    • Immediately pour onto prepared foil/liner, quickly spreading as thin as possible without holes.
    • Break into the smallest pieces possible when cool to make it easier to cut the cake.

    Step 3: Peanut Butter Frosting Layer

    Peanut Butter-Chocolate Celebration Cake-peanut butter layer

    Spread one cake layer with about a cup of the frosting and top with the second layer.

    Peanut Butter-Chocolate Celebration Cake-peanut butter frosting laye

    Use the remaining filling to frost the sides and top of the cake and refrigerate for about 10 minutes until set.

    Step 4: The Ganache

    Ganache frosting for peanut butter-chocolate celebration cake

    The peanut butter frosting is topped with a chocolate ganache (yesssss). Most ganache recipes are made with cream, but this uses butter, which gives it a nice flavor.

    Ganache Frosting Tips

    • Heat the ganache ingredients in a microwave for 1 minute or over a double boiler. In either case, stir until smooth - and don't heat for more than another 10-20 seconds if using the microwave.
    • To thicken the ganache for frosting, put it in the fridge or freezer (keep careful watch in the freezer, though).
    • Biggest Tip- the secret to a clean ganache edge: take strips of wax paper and tuck them under the edges of the cake, making sure to overlap where they meet (as seen in the photos). After frosting with ganache, pull the paper strips away, leaving a clean edge. Love it.
    • If your glaze is not as thick as it should be when pouring and it pools on the wax paper strips, don't worry! This is a very forgiving cake (and I never try for perfectly smooth frosting, anyway, as you might guess...) and the glaze thickens as is cools, so simply take a spatula and scrape it off the paper and back onto the sides of the cake, were it will now stay.

    Step 5: Decorate

    Peanut Butter-Chocolate Celebration Cake peanut brittle decoration

    Place the broken peanut brittle on the top of the cake, arranging them any way you like.

    Peanut Butter-Chocolate Celebration Cake-perfect for any occasion a candy-bar-like confection is called for.

    Since it's not easy to cut through the brittle pieces (lesson learned...), I've tried lots of different patterns and have settled on a pile in the center and then around the edges. Then it's easy to move them a bit with the tip of the knife when cutting.

    Peanut Butter Chocolate Celebration Cake

    Oh, and if you or someone you love has an allergy to peanuts, I would definitely make this with almond butter and almond brittle. Cashews, anyone? You'll want to try whatever you need to in order to share this with as many people as you can!

    Peanut Butter Celebration Cake
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    Peanut Butter Chocolate Celebration Cake

    This amazing peanut butter-chocolate cake will make any occasion special. Make a bakery-worthy cake with this tutorial and prepare for the raves!
    Prep Time1 hr
    Cook Time18 mins
    Total Time1 hr 18 mins
    Course: Desserts
    Cuisine: American
    Yield: 14 servings
    Author: Jami Boys

    Ingredients

    Cake:

    • 1 cup flour
    • 1/3 cup cocoa powder
    • 1/2 teaspoon salt
    • 1/4 teaspoon baking soda
    • 1/4 teaspoon baking powder
    • 10 tablespoons butter softened
    • 1 cup sugar
    • 1 teaspoon vanilla
    • 2 large eggs
    • 1/2 cup sour cream or yogurt

    Peanut Brittle:

    • 1/2 cup sugar
    • 1/4 cup water
    • 1/8 teaspoon cream of tartar
    • 1/2 cup peanuts chopped

    Peanut Butter Frosting:

    • 1 cup peanut butter peanuts and salt only kind
    • 1/2 cup powdered sugar
    • 6 tablespoons butter softened
    • 1/4 teaspoon vanilla

    Ganache:

    • 8 ounces bittersweet chocolate 8 squares
    • 1/2 cup butter cut in pieces
    • 1 tablespoon honey

    Instructions

    • Prepare cake: Heat oven to 350 degrees. Butter two 9-inch cake pans; line the bottoms with wax paper and then butter the paper.
    • Combine the flour, cocoa, salt, baking powder and baking soda in a small bowl; set aside. Beat the butter in a mixer bowl until creamy, then add the sugar and vanilla and mix. Add the eggs one at a time, then beat two minutes after they're added.
    • Add the dry ingredients alternately with the sour cream, beating just until blended. Spoon the batter into the pans evenly, spreading the tops smooth (batter will be thick).
    • Bake about 16-18 minutes or until a toothpick comes out clean from the center. DO NOT OVER BAKE. Cool on racks for 5 minutes, then invert and remove wax paper. Invert again on racks and cool completely.
    • Make Peanut Brittle: Place a silicone liner on a cookie sheet (or a greased piece of foil). Combine sugar, water and cream of tartar in a small saucepan. Bring to a simmer over medium heat. Cover and simmer 3 minutes.
    • Remove cover and cook until syrup is pale amber in color, 8 to 12 minutes. Stir in peanuts and cook until syrup is a deep amber, being careful not to burn (only a few minutes). Pour right away onto prepared sheet, spreading as thin as possible. When completely cool, break into small pieces.
    • Make Peanut Butter Frosting:Combine all frosting/filling ingredients in a bowl of a mixer and beat until well blended.
    • Make Ganache:Place chocolate, butter, and honey in a microwave-safe bowl and microwave for 1 minute. Stir, and microwave for 10 to 20 seconds more, if needed for all the chocolate to melt (alternately melt in a double boiler, stirring until melted). Cool by placing in the refrigerator while assembling the cake.

    Assemble Cake:

    • Place one layer on a serving plate and frost with 1 cup of peanut butter frosting. Top with second layer and spread top and sides with remaining frosting. Refrigerate about 10 minutes until frosting is set.
    • Remove ganache from fridge and whisk until smooth. Tuck strips of wax paper under the cake and pour the ganache onto the center top of the cake, letting it flow over the sides. Spread with a metal spatula to cover top and sides, using any that flows onto paper strips, if needed.
    • Remove paper strips and garnish the top with the peanut brittle pieces.

    Notes

    To Make Ahead: prepare cake, cool and freeze for up to a month. Prepare brittle, cool and keep in at room temperature for a day. Frostings are best prepared the day of serving.

    Nutrition

    Serving: 1slice | Calories: 572kcal | Carbohydrates: 48g | Protein: 9g | Fat: 40g | Saturated Fat: 20g | Cholesterol: 80mg | Sodium: 379mg | Potassium: 323mg | Fiber: 4g | Sugar: 35g | Vitamin A: 696IU | Vitamin C: 1mg | Calcium: 49mg | Iron: 2mg
    Did you make this recipe?Mention @anoregoncottage or tag #anoregoncottage!

     

    Note: This recipe was originally published in 2010. It's been updated with all new photos and a printable recipe for your enjoyment.

     

    Other special desserts you may like:

    White Zucchini Cake with caramel-nut frosting

    White Zucchini Cake with Broiled Caramel-Nut Frosting

    WOW. A drool-worthy Dark Chocolate Spelt Cake with Mocha Ganache.

    Dark Chocolate Spelt Cake with Mocha Ganache

     

    Giant Chocolate Chip Cookie - An Oregon Cottage

    Giant Chocolate Chip Cookie {aka, Skillet Cookie}

    About Jami

    Since 2009 Jami Boys has been helping readers live a simple homemade life through whole food recipes, doable gardening, and easy DIY projects on An Oregon Cottage. From baking bread, to creating a floor from paper, to growing and preserving food, Jami shares the easiest ways to get things done. She's been featured in Cottages and Bungalows, Old House Journal, and First for Women magazines as well as numerous sites like Good Housekeeping, Huffington Post, and Apartment Therapy.

    Reader Interactions

    Comments

    1. Jason says

      May 05, 2016 at 8:14 am

      Wow. What a beautiful cake. Going to try this with almond butter instead of peanut. Thank you for the recipe!

      Reply
    2. Andrew Hopkins says

      May 04, 2016 at 12:28 am

      Excellent idea, I think I am going to make one large one for my girls birthday.
      Thank for share!!

      Reply
      • Jami says

        May 04, 2016 at 1:58 pm

        I've done that often, Andrew, though I've made 1-1/2 recipes and made 2 9x13' sized cakes and doubled the filling. It makes a taller, bakery style sheet cake that you can cut into smaller pieces to feed a crowd.

        Reply
    3. Cheryl says

      July 10, 2011 at 1:25 pm

      I tried this for my 12 year olds birthday at his request. I loved it, it was easy and yummy. Only change I would make is to use semi-sweet chocolate next time instead of the bittersweet.

      Reply
    4. Laura says

      August 31, 2010 at 6:47 pm

      Okay, so you weren't kidding about this cake. We left the brittle out entirely and it was still absolutely delicious--I think we've found a new favorite! Thanks so much for sharing this yummy recipe!

      Reply
    5. Laura says

      August 20, 2010 at 5:59 pm

      Oo, that sounds like a yummy idea! I did some poking around already into the "chemistry of brittle," but I couldn't find any explanation of cream of tartar vs. baking soda, so I just thought I'd ask. I'll probably just use another brittle recipe. I've been looking for an excuse to make this since you posted it, and our wedding anniversary seems like a good one! Thanks for your advice!

      Reply
    6. Jami @ An Oregon Cottage says

      August 20, 2010 at 2:25 am

      Laura- I wish I knew enough about brittle to know why it needs cream of tartar- I think other brittles use soda? Maybe a little research on the web would clarify it. Seems like you'd be able to substitute, but I haven't done it...sorry! If you decide not to try the brittle, chopped honey roasted peanuts sounds good to me- even more chocolate- in a shaved form...

      Reply
    7. Laura says

      August 19, 2010 at 7:36 pm

      Hi, Jami! I was just wondering if you had ever tried substituting baking soda or something for the cream of tartar in the brittle--I'm all out! I suppose it would still be yummy without the brittle, though--but what a delicious-looking cake!

      Reply
    8. Cheryl says

      July 01, 2010 at 5:10 pm

      Oh yum! I'm bookmarking this for my step-father's birthday. He is peanut butter obsessed!

      Reply
    9. the country cook says

      June 29, 2010 at 4:54 pm

      NICE! I'm going to have to make this for my husband sometime. I love your trick for keeping the cake plate clean - I'm going to have to remember that. - http://www.delightfulcountrycookin.com

      Reply
    10. Jenelle says

      June 28, 2010 at 9:15 pm

      Wow that looks good! Do I have to have something to celebrate to make it? Ok how about summer! Woo Hoo!

      Reply
    11. Vanessa says

      June 25, 2010 at 5:46 pm

      Oh my that looks amazingly delicious!!

      Reply
    12. Olga says

      June 25, 2010 at 1:12 am

      Oh, it looks so good. I wish I could have a piece.

      Reply
    13. Lexa says

      June 24, 2010 at 8:06 pm

      Jami- You hit my weak point with this one - chocolate & peanut butter - a match made in heaven! Looks amazing! Great job and thanks for sharing with such detail.

      Reply
    14. Ott, A. says

      June 25, 2010 at 1:19 am

      that looks delish!!! I could almost eat my monitor it looks sooo good.

      Reply
    15. Minerva's Garden says

      June 25, 2010 at 1:12 am

      This is a beautiful cake! I also just wanted to let you know how much I enjoy your blog--I just discovered it last week, and I went back and read several of your posts and even tried the Whole Wheat rolls recipe--they were wonderful! So thank you.

      Reply
    16. Denise says

      June 24, 2010 at 2:13 pm

      Looks absolutely delicious, now if I could just have a slice without going through all those steps - yum 😉

      Reply
    17. Candi says

      June 24, 2010 at 6:36 pm

      That's so beautiful! Very dramatic!

      Reply
    18. Laura says

      June 24, 2010 at 6:05 pm

      Oh, wow, I think my husband might be getting this one for his birthday next week. Yum!

      Reply
    19. April says

      June 24, 2010 at 10:12 am

      Yum, you had me from the words chocolate and peanut butter. 🙂

      Reply
    20. Chels says

      June 24, 2010 at 5:07 pm

      Oh my gosh my husband and his family is going to die!!! I am sooo making this!!! Thank you for all the step by step instructions 🙂 They were very helpful!!

      Reply
    21. lemonadesun says

      June 24, 2010 at 7:13 am

      oh my goodness! I know what we're having for dessert tonight 🙂

      Thank you so much for sharing this with us. {my mouth is watering :)}

      Reply

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