Chocolate & Peanut Butter Bar Cake

Introduction

If you’re a fan of rich, creamy desserts that feel indulgent but are surprisingly easy to make, this Chocolate & Peanut Butter Bar Cake is about to become your new obsession. Imagine layers of soft chocolate cake, silky peanut butter goodness, and a chocolatey finish that melts in your mouth with every bite. It’s the kind of dessert that disappears quickly at parties, family dinners, or even quiet nights when you “just want a small slice” (we all know how that ends 😉).

I first made this Chocolate & Peanut Butter Bar Cake for a casual family gathering, thinking it would be a simple treat. Little did I know it would steal the spotlight from every other dessert on the table. Fun fact: chocolate and peanut butter have been a beloved flavor duo since the early 20th century, and once you taste them together, it’s easy to see why this pairing has stood the test of time.

What makes this cake extra special is its simplicity. You don’t need fancy equipment or advanced baking skills—just basic ingredients and a little enthusiasm. It’s quick to prepare, easy to slice into bars, and perfect for kids and adults alike. If you loved our popular Chocolate Fudge Brownies, this recipe takes things up a notch with a creamy peanut butter twist. Trust me, once you try it, you’ll be counting down the minutes until you can make it again.

What is Chocolate & Peanut Butter Bar Cake?

So, what exactly is a Chocolate & Peanut Butter Bar Cake? Is it a cake? Is it a bar? Or is it just a delicious excuse to eat more chocolate and peanut butter? The answer is: yes to all of the above! This dessert combines the soft texture of cake with the convenience of bars, making it easy to serve and even easier to love.

Legend has it that recipes like this were born when bakers couldn’t decide between brownies and cake—so they made both at once. And honestly, who can blame them? After all, “the way to a man’s heart is through his stomach,” and this cake knows exactly where it’s going. With layers that feel playful and indulgent, this recipe is calling your name. Go on, preheat that oven and give it a try—you deserve it!

Why You’ll Love This Chocolate & Peanut Butter Bar Cake

First, the main highlight: flavor. This cake delivers a deep chocolate base paired with creamy, nutty peanut butter that balances sweetness perfectly. Each bite is rich without being overwhelming, making it dangerously easy to go back for seconds.

Second, it’s budget-friendly. Making this Chocolate & Peanut Butter Bar Cake at home costs far less than buying bakery-style desserts, and you likely already have most of the ingredients in your pantry. No expensive tools, no specialty items—just simple baking at its best.

Third, the toppings and layers are pure magic. From the smooth peanut butter layer to the glossy chocolate topping, every element adds texture and flavor. If you enjoyed our No-Bake Peanut Butter Bars, this baked version offers a heartier, cake-like experience. Ready to fill your kitchen with the smell of chocolate? Let’s get baking!

How to Make Chocolate & Peanut Butter Bar Cake

Quick Overview

This Chocolate & Peanut Butter Bar Cake is as easy as it is delicious. You’ll make a simple chocolate cake base, add a creamy peanut butter layer, and finish with a rich chocolate topping. The result is soft, gooey, and incredibly satisfying. From start to finish, you’ll need about 45–50 minutes, including baking time, making it perfect for busy days or last-minute dessert cravings.

Key Ingredients for Chocolate & Peanut Butter Bar Cake

Here’s everything you’ll need:

• 1 ½ cups all-purpose flour

• 1 cup granulated sugar

• ½ cup unsweetened cocoa powder

• 1 tsp baking soda

• ½ tsp salt

• ¾ cup milk

• ½ cup vegetable oil

• 2 large eggs

• 1 tsp vanilla extract

• ¾ cup creamy peanut butter

• ½ cup powdered sugar (for the peanut butter layer)

• ½ cup chocolate chips

• ¼ cup heavy cream

Make sure your ingredients are at room temperature for the best results.

Step-by-Step Instructions

1. Preheat and Prepare
   Preheat your oven to 350°F (175°C). Line a rectangular baking pan with parchment paper or lightly grease it to prevent sticking.

2. Mix the Dry Ingredients
   In a large bowl, whisk together the flour, sugar, cocoa powder, baking soda, and salt until well combined.

3. Add the Wet Ingredients
   Pour in the milk, vegetable oil, eggs, and vanilla extract. Mix until the batter is smooth and lump-free. Don’t overmix—just blend until combined.

4. Bake the Cake Layer
   Pour the batter into the prepared pan and spread evenly. Bake for 20–25 minutes, or until a toothpick inserted in the center comes out clean. Let it cool slightly.

5. Prepare the Peanut Butter Layer
   In a bowl, mix the peanut butter and powdered sugar until smooth and creamy. Spread this gently over the warm cake layer.

6. Make the Chocolate Topping
   Heat the heavy cream until just warm (not boiling), then pour it over the chocolate chips. Stir until smooth and glossy.

7. Finish and Set
   Pour the chocolate topping over the peanut butter layer and spread evenly. Allow the cake to cool completely before slicing into bars.

What to Serve Chocolate & Peanut Butter Bar Cake With

This Chocolate & Peanut Butter Bar Cake pairs beautifully with a cold glass of milk, a hot cup of coffee, or even a creamy latte. For a more indulgent dessert plate, serve it with a scoop of vanilla ice cream or a dollop of whipped cream. Fresh berries on the side add a pop of freshness that balances the richness perfectly.

Top Tips for Perfecting Chocolate & Peanut Butter Bar Cake

• Use creamy peanut butter for the smoothest layer; natural peanut butter can be too oily.

• Don’t overbake the cake layer—slightly moist is ideal for soft bars.

• Let it cool fully before slicing to get clean, neat bars.

• Swap chocolate chips for dark chocolate if you prefer a less sweet finish.

Avoid rushing the cooling process—this step makes all the difference in texture and presentation.

Storing and Reheating Tips

Store leftover Chocolate & Peanut Butter Bar Cake in an airtight container in the refrigerator for up to 5 days. For longer storage, wrap individual bars tightly and freeze for up to 2 months. To enjoy again, thaw at room temperature or warm briefly in the microwave for 10–15 seconds to bring back that soft, gooey texture.

This Chocolate & Peanut Butter Bar Cake is proof that simple ingredients can create unforgettable desserts. Give it a try, share it with loved ones, and don’t forget to explore more chocolatey recipes on the blog—you’re going to love every bite! 🍫🥜