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Chocolate Peanut Butter Marble Cake

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“This is a cake recipe that I found on and thought it was worth sharing. I made it a few weeks ago for my cousins birthday and decorated it as Spongebob Squarepants! It was awesome! Everyone loved it and polished the whole thing off. If you love Reese's, or anything peanutty/chocolattely you will LOVE this cake”
1hr 15mins
1 13x9 in cake

Ingredients Nutrition


  1. Preheat oven to 350 degrees F (175 degrees C).
  2. Spray a 9X13X2 in pan with cooking spray and dust with flour. Set aside.
  3. In a small bowl, stir together the cocoa, confectioners' sugar, butter and 2 tablespoons hot water until smooth and set aside.
  4. In microwavable bowl, place peanut butter chips and shortening.
  5. Microwave on high for 1 minute, or until chips are melted and smooth when stirred.
  6. In large bowl, combine cake mix, brown sugar, 1-1/4 cups water, eggs and reserved melted peanut butter mixture; beat on low speed of electric mixer until moistened. Increase speed to medium, beat 2 minutes until smooth. Remove 1-1/2 cups of the batter and add it to the reserved cocoa mixture; blend well.
  7. Pour the peanut butter flavored batter into the prepared pan. Drop spoonfuls of the chocolate batter on top. Swirl with a knife or spatula for a marbled effect.
  8. Bake at 350 degree F (175 degrees C) for 40 to 45 minutes or until a wooden toothpick inserted in the center comes out clean. Cool and frost as desired.

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