Chocolate and peanut butter join forces in chocolate peanut butter cake, a dessert that delivers rich, indulgent flavor with a soft, tender crumb. Moist chocolate layers meet creamy, nutty frosting for a combination that’s satisfying in every slice. Baking at home is approachable, and frosting the cake becomes a fun and rewarding part of the process, perfect for weekend treats, birthdays, or spontaneous chocolate cravings. Each bite balances chocolate richness with the smooth, savory sweetness of peanut butter, creating a familiar yet elevated dessert experience. Chocolate peanut butter cake slices beautifully and pairs well with a simple beverage or ice cream, making it versatile for sharing. The result is a dessert that’s decadent, soft, and irresistible—perfect for anyone who loves the classic chocolate-peanut butter pairing.
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Why You’ll Love This Chocolate Peanut Butter Cake
Rich chocolate layers paired with creamy peanut butter frosting make this cake unforgettable.
- Dense, fudgy chocolate sponge contrasts with silky peanut butter
- Sweet and salty combination is deeply satisfying
- Ideal for birthdays, celebrations, or family desserts
- Easy to slice and serve for parties
- Classic flavor pairing that pleases everyone
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Ingredients
Cake Ingredients
- All-purpose flour: Provides structure and supports the cake’s rise.
- Light brown sugar: Adds sweetness, moisture, and a subtle caramel flavor.
- White granulated sugar: Sweetens and helps create a light, tender crumb.
- Milk: Adds moisture, richness, and contributes to a soft texture.
- Strong hot coffee: Intensifies the chocolate flavor and enhances depth.
- Vegetable oil: Keeps the cake moist and tender without overpowering flavor.
- Cocoa powder: Provides chocolate flavor and color, contributes slight dryness balanced by fats.
- Unsalted butter: Adds richness, flavor, and contributes to a tender crumb.
- Eggs: Bind ingredients, add structure, and help the cake rise.
- Vanilla extract/essence: Enhances sweetness and flavor complexity.
- Baking powder: Leavening agent to help the cake rise.
- Baking soda: Reacts with acidic ingredients to create lift and tender texture.
- Salt: Balances sweetness and intensifies chocolate flavor.
Peanut Butter Frosting Ingredients
- Powdered sugar: Sweetens and gives structure for a smooth, pipeable frosting.
- Unsalted butter: Provides richness, creaminess, and helps stabilize the frosting.
- Peanut butter: Adds flavor, creaminess, and a nutty, slightly savory balance.
- Heavy cream: Adjusts frosting consistency for smooth spreading or piping.
- Vanilla extract/essence: Enhances overall flavor and sweetness.
- Salt: Balances sweetness and prevents the frosting from tasting flat.
Tips To Get Your Recipe Right
- Add hot coffee slowly and steadily: Pour it in a thin stream down the side of the bowl while whisking constantly. This prevents the eggs from cooking and ensures a smooth, well-emulsified batter.
- Understand the coffee’s role: It doesn’t make the cake taste like coffee—it blooms the cocoa, unlocking deeper, richer chocolate flavor that plain water or milk can’t achieve.
- Choose the right peanut butter: Use standard creamy peanut butter for a stable, smooth frosting. Natural peanut butter with separated oil can make your buttercream split and curdled-looking.
- Whip your frosting long enough: A full ten-minute whip dissolves the sugar completely and incorporates air, making the dense peanut butter mixture light, fluffy, and easy to spread.
- Cool your cake layers completely before frosting: Any residual warmth will melt the butter in the frosting, causing it to slide off. Chilling for 30 minutes ensures smooth, manageable layers ready for decoration.
Storage Tips
- Room temperature for 1–2 days: Keep the cake under a glass dome or large overturned bowl. This preserves the soft chocolate sponge and keeps the peanut butter frosting smooth and spreadable.
- Refrigeration for warm or humid kitchens: Store in an airtight container for up to 5 days. Let slices sit at room temperature for at least an hour before eating, or microwave for 10 seconds to soften the frosting and sponge.
- Freezing individual slices for long-term storage: Place slices on a plate in the freezer for about an hour until the frosting hardens. Wrap each slice tightly in plastic wrap and foil. Thaw in the fridge overnight before serving.
- Protect cut edges: Press parchment paper directly against any exposed sponge to lock in moisture.
- Avoid wrapping warm cake: Never cover or wrap the cake while still warm, as trapped heat creates condensation that can make the sponge soggy and the frosting lose its fluffiness.
- Cover when chilling: Always store in a cake dome or airtight container in the fridge to prevent the chocolate sponge from drying out.
FAQs
Can I make this cake without the hot coffee?
Yes, you absolutely can. If you prefer to skip the coffee, you can use the exact same amount of plain hot water. The hot liquid is necessary to bloom the cocoa powder and make the batter smooth, but the coffee simply makes the chocolate taste richer and darker. The cake will still turn out incredibly moist without it.
Can I use natural peanut butter for the frosting?
It is highly recommended to stick to a standard commercial creamy peanut butter. Natural peanut butters tend to separate in the jar and have extra oil that floats to the top. If you use that extra oil in your frosting, it can easily cause the mixture to split, curdle, or become completely runny.
Why did my chocolate cake layers sink in the middle?
This usually happens if the oven door is opened too early or if your baking powder or baking soda is expired. Because this chocolate batter is mostly liquid, it needs steady, uninterrupted heat to rise and build its structure. Always test the very center with a toothpick to make sure it is completely baked before taking the pans out of the oven.
How long does this cake stay fresh?
If you keep it under a glass dome on your counter, it will stay incredibly soft for up to two days. If you need it to last a bit longer, put it in the fridge where it will stay fresh for up to five days. Just remember to let your refrigerated slice warm up on the counter for about an hour before eating so the frosting gets soft again.
What is the best way to serve this dessert?
This cake is rich, salty, and incredibly chocolatey, so it pairs perfectly with a cold glass of milk or a hot cup of black tea to balance the flavors. Always serve it at room temperature so the sponge is at its softest and the fluffy frosting melts right in your mouth.
Chocolate Peanut Butter Cake
12
servings15
minutes38
minutes1
hourThis chocolate peanut butter cake is rich, fudgy, and loaded with the ultimate chocolate-peanut butter combo.
Ingredients
- For The Chocolate Cake
1 ¾ Cups (210 G) All-Purpose Flour
1 Cup (200 G) Soft Light Brown Sugar
1 Cup (200 G) White Granulated Sugar
¾ Cup (180 G) Milk (Room Temperature, Whole Milk)
¾ Cup (180 G) Strong Hot Coffee
½ Cup (105 G) Unflavored Vegetable Oil (Like Canola Oil)
¾ Cup (75 G) Cocoa Powder (Dutch-Processed Preferred)
¼ Cup (56 G) Unsalted Butter (Melted)
2 Large Eggs (Room Temperature)
2 ½ Tsps Vanilla Extract/Essence
2 Tsps Baking Powder
1 Tsp Baking Soda
1 Tsp Salt (Use ½ Tsp If Using Salted Butter)
- For The Peanut Butter Frosting
2 ½ Cups (300 G) Powdered Sugar (Also Known As Icing Or Confectioners Sugar)
1 ¼ Cups (283 G) Unsalted Butter (Room Temperature)
¾ Cup (195 G) Peanut Butter (Use A Smooth, Creamy Version)
⅓ Cup (80 G) Heavy Cream (Room Temperature)
1 ½ Tsp Vanilla Extract/Essence
¼ Tsp Salt
Directions
- Set your oven to 180°C (350°F). Grease two 8-inch cake pans and line the bottoms with parchment paper so the cakes don't stick.
- Sift your flour, cocoa powder, baking powder, baking soda, and salt into a medium bowl. Give it a quick whisk to make sure everything is evenly distributed, then set it aside.
- In a separate large bowl, whisk together the brown and white sugars, milk, melted butter, oil, eggs, and vanilla until the mixture is uniform.
- Pour your sifted dry ingredients into the wet mixture. Whisk them together just until you no longer see streaks of flour. You want to be gentle here to avoid a tough cake.
- Pour in your hot coffee and whisk again until the batter is smooth. The hot liquid helps dissolve any remaining cocoa lumps and thins out the batter for a moist crumb.
- Divide the batter evenly between your two pans. Give them a quick tap on the counter to pop any big air bubbles. Bake for about 38 minutes. When a toothpick comes out clean or with just a few moist crumbs, they are ready.
- Let the cakes rest in their pans for 20 minutes before flipping them onto a wire rack to finish cooling completely.
- Making The Peanut Butter Frosting
- Put your room-temperature butter, powdered sugar, vanilla, cream, peanut butter, and salt into a large mixing bowl (use the paddle attachment if you have a stand mixer).
- Start on the lowest speed for about a minute so the sugar doesn't fly out of the bowl. Once it is combined, turn the speed up to medium-high and let it whip for a full 10 minutes.
- Stop halfway through to scrape down the sides of the bowl. When the time is up, the frosting should look pale, silky, and incredibly light. It is now ready to be spread over your cooled cake layers.
