Peanut Butter Oreo Cake (Creamy Dessert)

Peanut Butter Oreo Cake is a rich chocolate cake layered with creamy peanut butter Oreo buttercream and topped with chocolate ganache.

My Baking Addiction inspired this dessert, and I made it to enjoy a decadent treat at home. I have baked this peanut butter Oreo cake multiple times and enjoy sharing it with family and friends.

While following the basic recipe, I added a few personal modifications, like extra Oreos in the frosting and slightly more peanut butter for flavor.

Now I will show step-by-step instructions to make this delicious peanut butter Oreo cake.

About This Peanut Butter Oreo Cake

This Peanut Butter Oreo Cake is a creamy dessert that combines rich chocolate cake with smooth, decadent peanut butter Oreo buttercream.

Layers of moist chocolate cake are filled with a luscious peanut butter frosting that has crushed Oreos folded in for extra texture and flavor.

The cake is finished with a silky chocolate ganache and decorated with whole Oreos, crushed cookies, and peanut butter cups.

Every slice delivers a balance of chocolate and peanut butter, making it a crowd-pleasing treat. This peanut butter oreo cake is indulgent, festive, and perfect for sharing with family and friends.

How To Prepare Peanut Butter Oreo Cake?

Preparation Time: 30 minutes

Cooking Time: 40 minutes

Total Time: 1 hour 10 minutes

Course: Dessert

Cuisine: American

Yield: 12 servings

Kitchen Utensils

• Mixing bowls
• Electric mixer or stand mixer
• 2–3 9-inch cake pans
• Measuring cups and spoons
• Whisk and spatula
• Cooling rack
• Saucepan

Ingredients

For the Cake:

• 1 1/2 cups (177 g) good quality dark cocoa powder
• 4 cups (480 g) all-purpose flour
• 3 1/2 cups (700 g) granulated sugar
• 2 cups (480 g) buttermilk, room temperature
• 1 cup (218 g) vegetable oil
• 6 large eggs, room temperature
• 4 tsp (16 g) baking soda
• 1 1/2 cups (354 g) hot water
• 1 1/2 tsp (6 g) baking powder
• 2 tsp (8.4 g) vanilla extract
• 2 tsp (11 g) salt

For Peanut Butter Oreo Buttercream:

• 1 cup creamy peanut butter
• 1 lb (454 g) salted butter, softened
• 3–4 tbsp heavy cream
• 7 cups powdered sugar
• 20 Oreos, divided
• 1 tbsp vanilla extract

For Chocolate Ganache:

• 100 g dark chocolate
• 60 ml heavy cream

For Decoration:

• Whole Oreo cookies
• Crushed Oreos
• Peanut butter cups

Instructions

Step 1: Preheat and prep pans

Set your oven to 350°F (175°C). Grease 2 or 3 nine-inch cake pans and line them with parchment paper so the cakes don’t stick.

Step 2: Mix dry ingredients

In a large bowl, sift together cocoa powder, flour, baking soda, baking powder, and salt. Set this mixture aside for later.

Step 3: Combine wet ingredients

In another bowl, whisk together eggs, sugar, oil, buttermilk, and vanilla extract until the mixture is smooth and creamy.

Step 4: Combine wet and dry ingredients

Gradually add the dry ingredients to the wet ingredients. Mix gently until everything is just incorporated.

Step 5: Add hot water

Slowly pour in hot water while stirring. The batter will be thin, but that’s what makes the cake moist.

Step 6: Bake the cake

Pour the batter evenly into the prepared pans. Bake for 35–40 minutes. Check by inserting a toothpick into the center—if it comes out clean, the cake is done. Let the cakes cool in the pans for 10 minutes, then move them to a cooling rack to cool completely.

Step 7: Prepare the buttercream

Beat butter and peanut butter together until smooth. Add powdered sugar gradually, about a cup at a time. Mix in heavy cream and vanilla extract until fluffy. Crush 15 Oreos and fold them gently into the buttercream.

Step 8: Make the ganache

Heat heavy cream until it starts to simmer. Pour it over chopped dark chocolate and let it sit for 1–2 minutes. Stir until smooth and let it cool slightly before using.

Step 9: Assemble the cake

If the cakes are uneven, level them with a knife. Spread a layer of buttercream between each cake layer. Frost the outside with the remaining buttercream. Pour ganache over the top and spread gently toward the edges.

Step 10: Decorate

Top the cake with whole Oreos, crushed Oreos, and peanut butter cups as you like. Chill the cake for about 30 minutes to let everything set before serving.

Nutritional Amount Of Peanut Butter Oreo Cake

Nutrition	Amount
Calories	620 kcal
Carbohydrates	85g
Protein	8g
Fat	28g
Saturated Fat	12g
Sugar	60g
Sodium	310mg

Why It’s A Favorite Among Dessert Lovers

This Peanut Butter Oreo Cake is a favorite among dessert lovers because it brings together two irresistible flavors: chocolate and peanut butter.

The moist chocolate layers complement the creamy peanut butter Oreo frosting, while the chocolate ganache adds a rich, silky finish.

The combination of textures, from soft cake to crunchy Oreos, makes it exciting to eat. Its visually appealing decoration with whole Oreos and peanut butter cups adds to the indulgence.

This Peanut Butter Oreo Cake satisfies cravings, delights the eyes, and creates a memorable dessert experience, making it beloved by anyone who enjoys decadent treats.

Why You’ll Love This Recipe

You’ll love this Peanut Butter Oreo Cake recipe because it delivers a rich, indulgent dessert that is surprisingly easy to make at home.

The chocolate cake stays moist while the peanut butter Oreo buttercream adds a creamy, flavorful layer. Chocolate ganache on top enhances the decadence, and the Oreo and peanut butter cup decorations make it fun and festive.

The Peanut Butter Oreo Cake allows small personal touches, like extra Oreos in the frosting, to match your taste. It’s a crowd-pleaser that combines classic flavors in a dessert everyone will enjoy.

Why My Recipe Works

My recipe works because each ingredient and step is designed to balance flavor, texture, and moisture. The chocolate cake layers stay soft and tender thanks to the hot water, which helps create a moist batter.

Combining peanut butter into the buttercream adds richness and depth, while folding in crushed Oreos gives a delightful crunch and flavor contrast. The ganache on top creates a smooth, shiny finish that complements the creamy frosting and soft cake.

Simple adjustments I made, like extra Oreos and slight tweaks in frosting consistency, enhance taste without complicating the process, making the cake reliably delicious every time.

My Favorite Ways To Serve It Up

One of my favorite ways to serve this Peanut Butter Oreo Cake is with a cold glass of milk, letting the chocolate and peanut butter flavors melt together.

I also love cutting it into small squares for sharing at parties, so everyone can enjoy a little bite without feeling too full. Sometimes I add extra crushed Oreos or a drizzle of chocolate syrup on top for a fun, festive touch.

Serving it slightly chilled makes the frosting firmer, while room temperature slices are soft and creamy. Pairing it with coffee or hot chocolate makes it feel like an extra-special treat.

When To Serve

This Peanut Butter Oreo Cake can be served on special occasions, celebrations, or as a treat for family and friends. It works perfectly for birthdays, holidays, or dessert tables at parties.

It can also be enjoyed as an indulgent weekend dessert or whenever a rich, chocolate and peanut butter treat is desired. Serve chilled or at room temperature to enjoy the creamy buttercream and ganache at their best.

Slicing Peanut Butter Oreo Cake carefully ensures every piece has layers of cake, frosting, and Oreo bits, making each serving a decadent experience.

Professional Baking Tips

➢ Bring eggs and buttermilk to room temperature before starting. This helps them blend smoothly into the batter and keeps the cake moist.

➢ Sift cocoa powder and flour before adding them to the batter. Sifting prevents lumps and keeps the cake light and fluffy.

➢ Use hot water when combining ingredients. It helps the cocoa dissolve completely and deepens the chocolate flavor.

➢ When adding flour to the wet mixture, fold gently. Over mixing can make the cake dense instead of tender.

➢ Crush Oreos lightly instead of grinding them into powder. Small chunks in the frosting give a nice texture and bursts of flavor.

➢ Let the cake layers cool completely before frosting. Applying buttercream or ganache to a warm cake can cause it to melt and lose structure.

Best Variations

➤ Salted Caramel Oreo Cake – Layer the cake with homemade or store-bought salted caramel sauce along with the peanut butter Oreo buttercream. The caramel adds a sweet-salty flavor that complements the chocolate and peanut butter perfectly, creating a richer and more indulgent dessert.

➤ No-Bake Oreo Peanut Butter Cake – Replace the baked layers with Oreo cookie crumbs pressed into a pan and layered with chilled peanut butter cream. This version is lighter and perfect for warm days or when you want a quick, decadent dessert without baking.

➤ Peanut Butter Banana Oreo Cake – Add mashed ripe bananas into the chocolate cake batter. The banana keeps the cake extra moist and adds a subtle natural sweetness, which pairs beautifully with the peanut butter and Oreo frosting.

➤ Double Chocolate Oreo Cake – Increase the chocolate intensity by adding cocoa powder to the frosting and topping the cake with mini chocolate chips or chocolate shavings. This creates a deep, chocolate flavor that enhances the peanut butter and Oreo combination, making it irresistible for chocolate lovers.

Cake Storage

Peanut Butter Oreo Cake can be stored in several ways to keep it fresh and delicious. Keep the cake covered at room temperature for up to 2 days, ideally in a cake dome or airtight container.

For longer storage, refrigerate the cake for up to 5 days, making sure it is tightly wrapped or in an airtight container to prevent it from drying out.

The frosting and ganache may firm up in the fridge, so let the cake sit at room temperature for 20–30 minutes before serving. You can also freeze slices or the whole cake for up to 2 months, wrapped well in plastic and foil.

Conclusion

This Peanut Butter Oreo Cake is truly an amazing dessert that everyone enjoys. Every time I make it, I love watching how much people savor each slice and appreciate the rich chocolate, creamy peanut butter, and crunchy Oreo layers.

Baking this Peanut Butter Oreo Cake has become a favorite tradition because it always brings smiles and makes celebrations extra special. I always enjoy the process of layering, frosting, and decorating it.

I hope you will try making this Peanut Butter Oreo Cake too and experience the same joy and delicious results that I do every time.

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