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Peanut Butter Sheet Cake With Peanut Butter Frosting

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“Attention all peanut-butter lovers, I urge you not to pass this one up, this is a wonderful moist cake with delicious peanut butter frosting :) Servings are only estimated depending on the the size of the slices.”

Ingredients Nutrition


  1. Set oven to 350°F (oven rack set to second-lowest position).
  2. Line the bottom of a 10 x 15-inch jellyroll pan with parchment paper.
  3. In a large bowl stir together flour, sugars, baking soda, salt and cinnamon (if using).
  4. In a saucepan combine water with 3/4 cup butter; bring to a boil; remove from heat then stir in peanut butter and oil; mix until completely blended, then add/stir into the flour mixture until combined.
  5. In a bowl mix together eggs with buttermilk and vanilla until completely combined, then stir into the peanut butter/flour mixture until combined (batter will be thin).
  6. Spread the batter into prepared pan.
  7. Bake for 18-25 minutes or until cake tests done (watch closely this cake bakes quickly!).
  8. Cool cake in pan completely.
  9. For the frosting; in a large bowl beat butter with peanut butter and vanilla until light and fluffy.
  10. Beat in the whipping cream until combined.
  11. Add in 1/2 cup confectioners sugar to start then beat in the remaining confectioners sugar adding in more if necessary to achieve desired consistency.
  12. Spread over cooled cake.

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