Vanilla Cake with Peanut Butter Filling and Chocolate Buttercream Frosting
Ingredients
Directions / Instructions
Why You'll Love This Vanilla Cake with Peanut Butter Filling
If you're searching for the ultimate celebration cake, this Vanilla Cake with Peanut Butter Filling and Chocolate Buttercream Frosting delivers everything you could want in one stunning dessert. Every layer combines buttery vanilla sponge, smooth peanut butter filling, and rich chocolate buttercream to create an irresistible balance of flavors and textures. The light vanilla cake provides the perfect foundation for the creamy peanut butter center, while the silky chocolate frosting adds deep cocoa richness that perfectly complements the sweet cake.
This cake is ideal for birthdays, anniversaries, family celebrations, holidays, bake sales, or whenever you're looking to impress guests with a homemade bakery-style dessert. Despite its elegant appearance, each component is straightforward to prepare using common pantry ingredients. The cake stays incredibly moist for several days, making it an excellent make-ahead dessert.
Ingredients
For the Vanilla Cake
- 2½ cups all-purpose flour
- 2½ teaspoons baking powder
- ½ teaspoon salt
- 1 cup unsalted butter, softened
- 1¾ cups granulated sugar
- 4 large eggs
- 1 tablespoon pure vanilla extract
- 1 cup whole milk
For the Peanut Butter Filling
- 1 cup creamy peanut butter
- ½ cup unsalted butter, softened
- 1½ cups powdered sugar
- 2 tablespoons heavy cream
- 1 teaspoon vanilla extract
For the Chocolate Buttercream Frosting
- 1 cup unsalted butter, softened
- 3½ cups powdered sugar
- ¾ cup unsweetened cocoa powder
- ¼ cup heavy cream
- 2 teaspoons vanilla extract
- Pinch of salt
Step-by-Step Instructions
1. Prepare the Cake Pans
Preheat the oven to 350°F (175°C). Grease and line two 9-inch round cake pans with parchment paper to ensure easy release after baking.
2. Mix the Dry Ingredients
Whisk together the flour, baking powder, and salt in a medium bowl until evenly combined. This ensures the leavening agent is distributed evenly throughout the batter.
3. Cream the Butter and Sugar
Using a stand mixer or hand mixer, beat the softened butter and granulated sugar together for about 4 minutes until light, fluffy, and pale in color. Proper creaming creates a tender crumb and adds volume to the finished cake.
4. Add Eggs and Vanilla
Add the eggs one at a time, beating well after each addition. Stir in the vanilla extract until fully incorporated.
5. Finish the Batter
Alternate adding the flour mixture and milk to the butter mixture, beginning and ending with the dry ingredients. Mix just until combined to keep the cake soft and tender.
6. Bake the Cake
Divide the batter evenly between the prepared pans. Bake for 28 to 32 minutes or until a toothpick inserted into the center comes out clean. Allow the cakes to cool in the pans for 10 minutes before transferring them to a wire rack to cool completely.
7. Prepare the Peanut Butter Filling
Beat together the softened butter and peanut butter until smooth. Gradually add the powdered sugar followed by the heavy cream and vanilla extract. Continue beating until the filling becomes light, fluffy, and spreadable.
8. Make the Chocolate Buttercream
Beat the butter until creamy. Slowly mix in the powdered sugar and cocoa powder. Add the heavy cream, vanilla extract, and salt, then beat for several minutes until smooth, fluffy, and silky.
9. Assemble the Cake
Place one cake layer on a serving plate. Spread the peanut butter filling evenly over the top, leaving a small border around the edge. Place the second cake layer on top and gently press to secure.
10. Frost the Cake
Apply a thin crumb coat of chocolate buttercream and refrigerate for 20 minutes. Finish with a thick layer of frosting over the top and sides using an offset spatula. Decorate with chocolate curls, chopped peanuts, peanut butter cups, chocolate ganache, or colorful sprinkles for an elegant presentation.
Expert Baking Tips
Always use room-temperature butter, eggs, and milk to create a smooth batter that bakes evenly. Measure flour correctly by spooning it into the measuring cup instead of scooping directly from the bag, which can lead to a dense cake. Avoid overmixing once the flour has been added because excessive mixing develops gluten and produces a tougher crumb. Cooling the cake layers completely before frosting prevents the buttercream from melting and sliding. For perfectly level cake layers, trim the domed tops with a serrated knife before assembling.
Storage Tips
Store the finished cake covered at room temperature for up to 2 days or refrigerate for up to 5 days. Allow refrigerated slices to sit at room temperature for 30 minutes before serving for the best texture and flavor. Individual slices can also be wrapped tightly and frozen for up to 3 months. Thaw overnight in the refrigerator before enjoying.
Serving Suggestions
Serve this rich layer cake with freshly brewed coffee, cold milk, espresso, vanilla ice cream, chocolate ice cream, caramel sauce, or fresh berries. It also pairs beautifully with whipped cream and makes an impressive centerpiece for birthdays, holiday dinners, baby showers, graduation parties, and family celebrations. Leftover slices are delicious lightly chilled or enjoyed at room temperature with your favorite hot beverage.
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