Chocolate Peanut Butter Brownie Bundt Cake

This cake is the ultimate indulgence for anyone who loves the classic flavor combination of rich chocolate and creamy peanut butter. It starts with a fudgy, crackly-topped brownie batter, but we’re baking it in a Bundt pan and swirling in a decadent peanut butter cheesecake filling for a stunning and delicious dessert.

Here is a complete guide to making a Chocolate Peanut Butter Brownie Bundt Cake.

Why This Recipe Works

The Best of Both Worlds: It has the dense, fudgy texture of a brownie with the impressive shape of a Bundt cake.
A Surprise in Every Slice: The swirl of peanut butter cheesecake isn’t just a topping; it runs through the middle of the cake.
Ganache Glaze: A simple chocolate ganache adds a professional finish and an extra layer of chocolate intensity.

The Grocery List (Ingredients)

For the Brownie Bundt Cake:

1 cup (2 sticks) Unsalted Butter
1 ¼ cups Semi-Sweet or Dark Chocolate Chips (quality matters here)
2 cups Granulated Sugar
4 large Eggs, at room temperature
1 tablespoon Vanilla Extract
1 cup All-Purpose Flour
½ cup Unsweetened Cocoa Powder
1 teaspoon Baking Powder
½ teaspoon Salt

For the Peanut Butter Swirl Filling:

8 oz Cream Cheese, softened
½ cup Creamy Peanut Butter (do not use “natural” style that separates)
¼ cup Granulated Sugar
1 large Egg
2 tablespoons Milk

For the Chocolate Ganache Glaze:

½ cup Semi-Sweet or Dark Chocolate Chips
½ cup Heavy Cream

The Step-by-Step Method

Step 1: Prep the Pan and Oven

Preheat your oven to 350°F (175°C) .

The Most Important Step: Generously grease and flour a 10-cup Bundt pan. Use a pastry brush to get butter into every nook and cranny, then dust with flour and tap out the excess. You can also use a baking spray that contains flour.

Step 2: Make the Brownie Batter (Melt and Mix)

In a large, microwave-safe bowl, combine the butter and 1 ¼ cups of chocolate chips. Microwave in 30-second intervals, stirring after each, until the mixture is smooth and fully melted.
Whisk the 2 cups of sugar into the warm chocolate mixture. It will be grainy.
Add the 4 eggs, one at a time, whisking well after each addition until fully incorporated. Add the vanilla extract.
In a separate small bowl, sift or whisk together the flour, cocoa powder, baking powder, and salt.
Gently fold the dry ingredients into the wet ingredients until just combined. Do not overmix. Set the batter aside.

Step 3: Make the Peanut Butter Swirl

In a medium bowl, beat the softened cream cheese with an electric mixer until smooth.
Add the peanut butter and ¼ cup sugar and beat until combined and creamy.
Beat in the 1 egg and 2 tablespoons of milk until the mixture is smooth. Set aside.

Step 4: Assemble the Cake

Pour half of the brownie batter into the prepared Bundt pan and spread it evenly.
Carefully spoon all of the peanut butter filling over the batter, keeping it away from the very edges of the pan to prevent it from burning.
Pour the remaining brownie batter over the peanut butter layer. Use a spatula to spread it gently to cover the filling.
The Swirl: Take a butter knife or a skewer and gently swirl it through the batter in a figure-eight pattern. Don’t overdo it; you want distinct ribbons of peanut butter, not a fully mixed cake.

Step 5: Bake

Bake for 50-60 minutes.
The Test: A long skewer or wooden pick inserted into the cake (aim for a chocolate area, not straight into the peanut butter) should come out with a few moist crumbs, but not wet batter.
Allow the cake to cool in the pan on a wire rack for 15-20 minutes. This is crucial for the structure to set.
After 20 minutes, place a serving plate over the pan and confidently invert it. Gently lift the pan off. If it sticks, let it cool for another 5 minutes and try again. Allow the cake to cool completely before glazing.

Step 6: Make the Ganache Glaze

Place the ½ cup of chocolate chips in a small, heat-safe bowl.
Heat the ½ cup of heavy cream in a small saucepan over medium heat until it just begins to simmer (small bubbles around the edge). Do not let it boil vigorously.
Pour the hot cream over the chocolate chips. Let it sit for 2-3 minutes to soften the chocolate.
Gently whisk until the mixture is smooth and glossy. Let it cool for 5-10 minutes to thicken slightly.

Step 7: Glaze and Serve

Spoon the thickened ganache over the top of the cooled Bundt cake, allowing it to drip elegantly down the sides.
For an extra touch, you can sprinkle chopped salted peanuts or a flaky sea salt over the wet ganache.
Let the glaze set for about 15 minutes before slicing and serving.

Pro-Tips for Success

Room Temperature Ingredients: For the filling, ensure your cream cheese and egg are at room temperature. This prevents a lumpy filling.
Don’t Overmix the Batter: Overmixing the brownie batter after adding the flour will develop gluten, making the cake tough instead of fudgy.
The Cooling Panic: Don’t try to flip the cake out too soon, or it will fall apart. The 15-20 minute rest in the pan is non-negotiable.
Serving Suggestion: This cake is phenomenal on its own, but a scoop of vanilla bean ice cream or a glass of cold milk takes it over the top.