Extreme Chocolate Peanut Butter Candy Bar Cake** Recipe
If you’ve ever dreamed of turning your favorite candy bars into the cake of your wildest imagination, then the Extreme Chocolate Peanut Butter Candy Bar Cake is your next baking adventure. Imagine: layers of rich chocolate cake, fudgy brownie base, silky peanut butter frosting, and a cascade of candy bar pieces topped with glossy ganache. Every forkful is pure decadence—sweet nostalgia and over-the-top indulgence combined. Trust me, this is the cake you make when you want memories, not just dessert!

Ingredients You’ll Need
This recipe is all about using show-stopping but trusty ingredients that fuse together for outrageous flavor and texture. Each element—whether it’s the bold cocoa or gooey candy bars—plays a role in building the signature taste and drama of the Extreme Chocolate Peanut Butter Candy Bar Cake.
- All-purpose flour: The sturdy backbone of both the brownie layer and the cake, giving every bite the right structure.
- Granulated sugar: Sweetens the deal and keeps the cakes tender and moist.
- Unsweetened cocoa powder (Dutch-processed preferred): Offers deep, genuine chocolate flavor for maximum cake intensity.
- Baking powder and baking soda: These leaveners ensure everything rises to fluffy and fudgy perfection.
- Salt: Just a touch pulls the sweet, chocolate, and peanut butter flavors together and makes them pop.
- Unsalted butter, melted & softened: Melted for dense fudge texture in the base, softened for creamy frosting.
- Eggs: Add richness and structure to hold all those dreamy layers.
- Vanilla extract: Brings a mellow warmth to both cake and frosting.
- Buttermilk (or milk + vinegar): For that tender crumb and subtle tang in the cake layers.
- Vegetable oil: Locks moisture into the chocolate cake for that melt-in-your-mouth quality.
- Hot brewed coffee: Secret weapon for amplifying chocolate flavor (you won’t taste the coffee itself).
- Creamy peanut butter: The star of the frosting, it gives luscious texture and nostalgic flavor.
- Powdered sugar: Makes the peanut butter frosting light, fluffy, and sweet.
- Milk or heavy cream: Adjusts your frosting for perfect spreadability and silkiness.
- Heavy cream (for ganache): Helps turn chocolate into a shiny, glossy fudge topping.
- Semi-sweet or dark chocolate (for ganache): Brings intense depth and balance to offset the sweet frosting and bars.
- Candy bars: Chilled and chopped, these bring crunch and gooey caramel swirls throughout the cake.
- Extra caramel sauce (optional): Adds irresistible goo factor as a final flourish.
- Roasted chopped peanuts (optional): Give a salty, satisfying crunch for bonus texture.
- Parchment, pans, mixer, piping tools: Your gear for pulling off these epic layers and swoops!
How to Make Extreme Chocolate Peanut Butter Candy Bar Cake
Step 1: Bake the Fudgy Chocolate Base
Start your Extreme Chocolate Peanut Butter Candy Bar Cake with a layer that’s equal parts brownie and cake—a dense, rich base that anchors all the flavor. Preheat your oven, grease and line your 8-inch pan, and whip up the batter quickly: simply whisk together the dry ingredients, then fold in the melted butter, eggs, and vanilla. Pour into your pan, bake until just set, and let it chill out on a rack. This step guarantees you’ll have the best of both worlds: substantial chews and tender crumb!
Step 2: Bake the Tender Chocolate Cake Layers
While the base cools, prep those classic chocolate cake layers. These buddies are light, fluffy, and super chocolatey (thank you, hot coffee!). Mix the dry ingredients in one bowl, beat in the wet ingredients, then stir in hot coffee until your batter is glossy and pourable. Divide between two pans and bake until a toothpick comes out clean. Let them rest in the pans before flipping onto a rack—they’ll finish cooling beautifully while you make the next magic.
Step 3: Make the Creamy Peanut Butter Frosting
Onto the crown jewel of this recipe! Beat softened butter until dreamy, then add in your best creamy peanut butter and whip until smooth. Gradually mix in sifted powdered sugar, alternating with milk or cream until the frosting is cloud-light but still sturdy enough to pile high. Add that vanilla and a pinch of salt—there’s nothing quite like homemade peanut butter frosting to make your kitchen smell like childhood dreams.
Step 4: Prepare the Dark Chocolate Ganache
Ganache brings the “wow” factor every single time. Gently heat your cream, pour it over your finely chopped chocolate, and let it sit for pure chocolate bliss. Stir until glossy and luscious, then let it cool just a tad—you want it thick enough to spread but still a little flowy for those irresistible chocolate ribbons between and on top of the cake.
Step 5: Assemble the Cake
This is where the Extreme Chocolate Peanut Butter Candy Bar Cake becomes an epic showstopper. Level your cooled layers for that professional finish. Start with the fudgy base on a platter, slather it in peanut butter frosting, and pour on your first ganache layer. Stack on a chocolate cake, spread another blanket of peanut butter frosting, and now shower with chopped candy bar pieces. Pour more ganache, top with the second cake layer, then give the whole thing a “crumb coat” of frosting to seal in crumbs. Chill, then do a final coat—smooth or swirled, baker’s choice!
Step 6: Decorate the Cake
Time for the over-the-top finale. Warm your remaining ganache and pour it over the cake so it drips just right. Fill a piping bag with peanut butter frosting and add fun swirls around the edge. Drizzle on more ganache or caramel, if you want to go all out, then pile on the last of your candy bar pieces (and maybe some peanuts for crunch). Refrigerate so every layer sets up into gorgeous slices. You did it—your cake is now bakery-worthy!
How to Serve Extreme Chocolate Peanut Butter Candy Bar Cake

Garnishes
This cake practically demands some finishing touches! Piped swirls of peanut butter frosting, a few buttery ribbons of ganache, generous caramel drizzles, and lots of extra chopped candy bar bits. Don’t forget roasted peanuts for an extra bit of salt and crunch—each bite gets even more exciting.
Side Dishes
With a cake as impressive as the Extreme Chocolate Peanut Butter Candy Bar Cake, keep side dishes simple: tall cold glasses of milk, freshly brewed coffee, or unsweetened tea make perfect pairings. If you’re going all-out, serve with a scoop of vanilla ice cream for the ultimate decadent dessert plate.
Creative Ways to Present
For parties, cut the cake into small, tall wedges and pile them high on a cake stand for a dramatic presentation. Or slice into “bars” for an easy-to-share twist, mimicking its candy bar inspiration. For birthdays, a gleaming cake dome makes things extra special, and extra caramel drizzle right before serving adds table-side excitement!
Make Ahead and Storage
Storing Leftovers
The Extreme Chocolate Peanut Butter Candy Bar Cake keeps beautifully—just cover with plastic wrap or an airtight cake dome and refrigerate. It’ll stay moist and irresistible for up to five days, and the flavors deepen the longer it rests, so leftovers are truly a treat!
Freezing
If you’d like to prep ahead, this cake freezes shockingly well. Wrap individual slices tightly in plastic wrap and place in a freezer bag, or wrap the entire decorated cake. Store in the freezer for up to two months. Thaw overnight in the fridge before serving, and always bring to room temperature for best flavor and texture.
Reheating
No need to reheat the whole Extreme Chocolate Peanut Butter Candy Bar Cake—a cold slice is divine! However, if you want to serve it just a bit gooey, let it sit at room temperature for 30–45 minutes. For a warm treat, microwave an individual slice for 10–15 seconds (make sure there’s no foil or non-microwave safe decoration).
FAQs
Can I make the cake layers in advance?
Absolutely! You can bake the brownie base and chocolate cakes up to two days ahead. Wrap them well in plastic wrap and store them at room temperature for easy assembly when you’re ready.
Do I have to use coffee in the chocolate cake?
If you prefer, you can swap hot water for the brewed coffee. Coffee simply intensifies the chocolate flavor, but it won’t make the cake taste like coffee—so no worries for caffeine-averse guests!
What’s the best way to get clean, picture-perfect cake slices?
Dip a sharp knife in hot water, wipe it dry between each cut, and slice through the chilled cake. This trick keeps layers sharp and the frosting neat, especially with ganache and candy bits inside.
How do I keep the candy bars from getting too soft or melty?
Chop your candy bars while they’re chilled from the fridge, and assemble the cake with slightly cooled layers. The quick assembly and refrigeration help the candy bits maintain their texture and give that trademark crunch.
Can I use different types of candy bars?
Yes, feel free to swap in your favorites! Any chocolatey, caramelly, peanutty bar will work—just aim for similar size and structure for even layering and slicing. Mixing up types makes every bite a new surprise.
Final Thoughts
This is not just cake—it’s an edible party, a memory-maker, and a guaranteed crowd-pleaser. Anytime you want to celebrate the sweet stuff in life, make the Extreme Chocolate Peanut Butter Candy Bar Cake and watch faces light up. So preheat the oven, gather your sweet-toothed friends, and take your dessert game to a whole new level!
PrintExtreme Chocolate Peanut Butter Candy Bar Cake** Recipe
Indulge in the ultimate decadence with this Extreme Chocolate Peanut Butter Candy Bar Cake. Layers of rich chocolate base, moist chocolate cake, creamy peanut butter frosting, dark chocolate fudge, and candy bar pieces come together for a show-stopping dessert that will wow any crowd.
- Prep Time: 45 minutes
- Cook Time: 1 hour
- Total Time: 2 hours 45 minutes
- Yield: 12–16 servings 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Ingredients
For the Chocolate Base Layer (Brownie/Fudge-like):
- 1 cup (125g) all-purpose flour
- 1 cup (200g) granulated sugar
- ½ cup (50g) unsweetened cocoa powder (Dutch-processed recommended)
- ½ teaspoon baking powder
- ¼ teaspoon baking soda
- ¼ teaspoon salt
- ½ cup (113g) unsalted butter, melted
- 2 large eggs
- 1 teaspoon vanilla extract
For the Moist Chocolate Cake Layers (2 x 8-inch round cakes):
- 1 ½ cups (190g) all-purpose flour
- 1 ½ cups (300g) granulated sugar
- ½ cup (50g) unsweetened cocoa powder
- 1 ½ teaspoons baking soda
- ¾ teaspoon baking powder
- ¾ teaspoon salt
- ¾ cup (180ml) buttermilk (or ¾ cup milk + ¾ tbsp white vinegar/lemon juice, let sit 5 mins)
- ⅜ cup (90ml) vegetable oil (or 6 tbsp)
- 2 large eggs
- ¾ teaspoon vanilla extract
- ¾ cup (180ml) hot brewed coffee (strong)
For the Creamy Peanut Butter Frosting:
- 1 cup (226g) unsalted butter, softened
- 1 ½ cups (360g) creamy peanut butter (smooth)
- 4–5 cups (480-600g) powdered sugar (icing sugar), sifted
- ¼ cup (60ml) milk or heavy cream, plus more as needed
- 2 teaspoons vanilla extract
- ¼ teaspoon salt
For the Dark Chocolate Fudge/Ganache Layers:
- 1 cup (240ml) heavy cream
- 8 oz (226g) good quality semi-sweet or dark chocolate, finely chopped
- 8–10 standard-sized chocolate-caramel-peanut candy bars (e.g., Snickers, Milky Way Simply Caramel with peanuts, or similar), chilled and chopped into bite-sized pieces
- Extra chocolate fudge/ganache (from above, or melt 2 oz extra chocolate with 2 tbsp cream for drizzle)
- Extra caramel sauce (store-bought or homemade, see previous recipes if desired)
- Piped swirls of peanut butter frosting
- Additional chopped candy bar pieces
- Optional: Roasted chopped peanuts
For the Candy Bar Pieces:
For Garnish/Decoration:
Instructions
- Bake the Chocolate Base Layer:
Preheat oven to 350°F (175°C). Grease and flour one 8-inch round cake pan. Line the bottom with parchment paper.
In a medium bowl, whisk flour, granulated sugar, cocoa powder, baking powder, baking soda, and salt.
In a separate bowl, whisk melted butter, eggs, and vanilla. Pour wet ingredients into dry, mix until just combined.
Pour batter into the prepared pan.
Bake for 20-25 minutes, or until a toothpick inserted into the center comes out with moist crumbs. Do not overbake.
Let cool completely in the pan on a wire rack. - Bake the Chocolate Cake Layers:
While the base cools, grease and flour two more 8-inch round cake pans. Line the bottoms with parchment paper.
In a large bowl, whisk together flour, granulated sugar, cocoa powder, baking soda, baking powder, and salt.
Add buttermilk, vegetable oil, eggs, and vanilla extract. Beat with an electric mixer on medium speed for 2 minutes.
Carefully stir in the hot brewed coffee (batter will be thin).
Divide batter evenly between the two prepared cake pans.
Bake for 30-35 minutes, or until a wooden skewer inserted comes out clean.
Let cool in pans for 10-15 minutes, then invert onto wire racks to cool completely. - Make the Creamy Peanut Butter Frosting:
In a large bowl, using an electric mixer, beat the softened butter until creamy.
Add the creamy peanut butter and beat until smooth.
Gradually add the sifted powdered sugar, alternating with milk/cream, until desired consistency is reached. Beat until light and fluffy.
Beat in vanilla extract and salt. - Make the Dark Chocolate Fudge/Ganache:
In a medium saucepan, heat heavy cream over medium heat until it just begins to simmer (do not boil).
Remove from heat and pour over finely chopped chocolate in a heatproof bowl. Let sit 5 minutes, then whisk until smooth and glossy.
Let cool slightly at room temperature until thick but still spreadable. - Assemble the Cake:
Level Cakes: Ensure all cake layers (including the base) are level.
Chocolate Base: Place the chocolate base layer on your serving plate or cake stand.
First Peanut Butter Layer: Spread a generous layer (about 1.5 cups) of peanut butter frosting over the chocolate base.
First Chocolate Fudge Layer: Carefully pour/spread about ⅔ cup of the slightly cooled chocolate fudge/ganache over the peanut butter frosting.
First Chocolate Cake Layer: Carefully place one chocolate cake layer on top.
Second Peanut Butter Layer & Candy: Spread another generous layer (about 1.5 cups) of peanut butter frosting over this cake layer. Sprinkle about half (4-5 bars worth) of the chopped candy bar pieces onto this frosting, pressing them gently.
Second Chocolate Fudge Layer: Pour/spread another ⅔ cup of chocolate fudge/ganache over the candy/peanut butter layer.
Second Chocolate Cake Layer: Place the final chocolate cake layer on top.
Crumb Coat: Apply a thin layer of peanut butter frosting all over the top and sides of the cake. Refrigerate for 15-20 minutes to set.
Final Coat: Apply a thicker, even layer of peanut butter frosting around the sides of the cake, leaving the top mostly covered with the previous fudge layer. You can create decorative swirls or a smooth finish on the sides.
Chill: Refrigerate the cake for at least 1-2 hours to allow the frosting and layers to set firmly. - Decorate the Cake:
Top Ganache: If the chocolate ganache for the top has set too much, warm it gently until it’s pourable again. Pour the remaining ganache (about ⅔ cup) over the top of the cake, spreading it smoothly to the edges and allowing some to drip down the sides of the cake.
Piped Frosting: Transfer some remaining peanut butter frosting to a piping bag fitted with a star tip. Pipe decorative swirls or dollops around the top edge of the cake.
Drizzles: Drizzle extra chocolate ganache and/or caramel sauce over the top of the cake, including the piped frosting.
Candy Garnish: Arrange the remaining chopped candy bar pieces and optional chopped peanuts on top of the cake, especially on the piped frosting and open areas.
Final Chill: Refrigerate the decorated cake for at least 1-2 hours before slicing to allow all elements to set.
Notes
- For a nut-free version, use a different frosting and omit the peanut candy bars.
- Adjust the sweetness of the frosting to your preference by adding more or less powdered sugar.
- Store the cake in the refrigerator but let it sit at room temperature for about 30 minutes before serving to soften slightly.
Nutrition
- Serving Size: 1 slice (assuming 1/16 of the cake)
- Calories: Approximately 650
- Sugar: Approximately 60g
- Sodium: Approximately 400mg
- Fat: Approximately 40g
- Saturated Fat: Approximately 20g
- Unsaturated Fat: Approximately 18g
- Trans Fat: 0g
- Carbohydrates: Approximately 70g
- Fiber: Approximately 4g
- Protein: Approximately 10g
- Cholesterol: Approximately 100mg
Keywords: chocolate, peanut butter, cake, candy bar, dessert, decadent