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Simple Chocolate Cake with Peanut Butter Frosting Recipe


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4 from 77 reviews

  • Author: Ava
  • Total Time: 2 hours 50 minutes (including cooling and frosting time)
  • Yield: 20 servings

Description

This Simple Chocolate Cake with Peanut Butter Frosting is a decadent and moist dessert perfect for any occasion. The rich chocolate cake is complemented by a creamy, fluffy peanut butter frosting, topped with chopped peanut butter cups and drizzles of melted chocolate and peanut butter for an irresistible finish.


Ingredients

Chocolate Cake

  • ¼ cup margarine or butter
  • 1 cup granulated sugar
  • 2 large eggs (room temperature)
  • 2 tsp baking powder
  • 1 tsp vanilla extract
  • 1 cup soured milk*
  • 1 tsp baking soda
  • 2 cups all-purpose flour
  • ⅓ cup unsweetened cocoa powder
  • ½ cup boiling water

Peanut Butter Frosting

  • 1 cup unsalted butter (softened)
  • 1 cup creamy peanut butter
  • 4 cups icing sugar (confectioners’ sugar), divided
  • 2 ½ tbsp milk or cream
  • 1 tsp vanilla extract
  • ⅛ tsp salt

Toppings (Optional)

  • Chopped peanut butter cups
  • Melted chocolate
  • Melted creamy peanut butter


Instructions

  1. Preheat and grease: Preheat your oven to 350°F (175°C). Grease a 9×13 inch cake pan thoroughly and set aside. Optionally, place a piece of parchment paper at the bottom to facilitate easy removal of the cake for frosting.
  2. Blend wet ingredients: In a large bowl, blend together ¼ cup margarine or butter, 1 cup sugar, and 2 large eggs until smooth and creamy. Add 2 teaspoons baking powder and 1 teaspoon vanilla extract, blending to combine.
  3. Mix sour milk and flour: In a separate bowl, mix 1 cup soured milk with 1 teaspoon baking soda. Alternately add this mixture and 2 cups all-purpose flour to the wet batter, mixing until just combined.
  4. Prepare cocoa mixture: Mix ⅓ cup unsweetened cocoa powder with ½ cup boiling water to dissolve and remove lumps. Slowly fold this cocoa mixture into the batter, ensuring everything is fully incorporated.
  5. Bake the cake: Pour the batter into the prepared cake pan, filling about ¾ full. Bake in the preheated oven for 20-25 minutes, or until a toothpick inserted into the center comes out clean. Allow the cake to cool completely before frosting.
  6. Make peanut butter frosting: Beat 1 cup softened unsalted butter on medium speed until fluffy. Add 1 cup creamy peanut butter, ½ cup icing sugar, 2 ½ tablespoons milk or cream, 1 teaspoon vanilla extract, and ⅛ teaspoon salt. Beat together until smooth.
  7. Finish frosting: Gradually add the remaining 3 ½ cups icing sugar to the frosting mixture, beating well after each addition until light and creamy.
  8. Frost the cake and garnish: Spread the peanut butter frosting evenly over the cooled cake. Optionally, garnish with chopped peanut butter cups and drizzle melted chocolate and/or melted creamy peanut butter on top. Slice and serve.

Notes

  • Soured milk can be made by adding 1 tablespoon lemon juice or vinegar to 1 cup milk and letting it sit for 5-10 minutes.
  • Ensure the eggs are at room temperature for better texture and blending.
  • To avoid lumps in your cocoa mixture, use boiling water and stir thoroughly.
  • The frosting can be adjusted in consistency with more or less milk or icing sugar.
  • Store leftover cake covered at room temperature for up to 2 days or refrigerate for 4-5 days.
  • Prep Time: 30 minutes
  • Cook Time: 25 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American