Servings
Font
Back
0 from 6 votes

Peanut Butter Sheet Cake

Fluffy, creamy, and packed with big flavor, this Peanut Butter Sheet Cake is the ultimate indulgence for peanut butter lovers everywhere!

Prep Time
10 mins
Cook Time
10 mins
Additional Time
1 hr
Total Time
1 hr 40 mins
Servings: 12 slices
Calories: 885 kcal
Course: Dessert
Cuisine: American

Ingredients

Cake
  • 3 cups cake flour
  • 1 tablespoon baking powder
  • 1 teaspoon salt
  • ½ cup unsalted butter softened
  • 1 ¼ cups light brown sugar packed
  • 2 teaspoons vanilla extract
  • ½ cup vegetable oil
  • ¾ cup creamy peanut butter
  • 4 large eggs
  • 1 ¼ cups whole milk
Frosting
  • 1 cup unsalted butter
  • 1 cup creamy peanut butter
  • ¼ cup unsweetened cocoa powder
  • 3 cups powdered sugar
  • ¼ cup heavy cream
  • 12 Reese's peanut butter cups for garnish (optional)

Instructions

    Cup of Yum
  1. Preheat the oven to 350 degrees F and grease a 9-inch x 13-inch baking pan with cooking spray. Set aside.
  2. In a medium-sized bowl, sift together the cake flour, baking powder, and salt. Set aside.
  3. Using a stand mixer (or a hand mixer) combine the brown sugar and butter together until it becomes light and fluffy.
  4. Add the vanilla and oil to the mixing bowl and mix until combined. Once combined, increase the speed to medium-high until the batter is once again light and fluffy.
  5. Add the peanut butter and mix until combined. Add the eggs one at a time.
  6. Add the flour in 3 parts, alternating with the milk, starting and finishing with the flour. Once the final part of flour is ready to be added, finish mixing by hand to prevent over mixing the batter.
  7. Pour the batter into the prepared baking sheet. Bake for 28-32 minutes or until a cake tester comes out clean.
  8. Remove from the oven and allow to cool on a wire rack completely before frosting.
  9. Prepare the frosting by creaming together the butter and peanut butter with a paddle attachment. Scrape the sides of the bowl and add in the cocoa powder and mix until fully combined.
  10. Add the powdered sugar 1 cup at a time, mixing slowly between each addition until incorporated. Slowly add in the heavy cream with the mixer running on low speed until incorporated then increase speed to medium-high and whip for about 2 minutes until light and fluffy.
  11. Spread the frosting over the cooled cake before cutting it into 12 slices. Place 1 unwrapped Reese's peanut butter cup on each slice for garnish, if desired.

Nutrition Information

Serving 1slice Calories 885kcal (44%) Carbohydrates 86g (29%) Protein 17g (34%) Fat 56g (86%) Saturated Fat 22g (110%) Polyunsaturated Fat 12g Monounsaturated Fat 19g Trans Fat 1g Cholesterol 132mg (44%) Sodium 415mg (17%) Potassium 503mg (14%) Fiber 4g (16%) Sugar 57g (114%) Vitamin A 914IU (18%) Vitamin C 1mg (1%) Calcium 134mg (13%) Iron 2mg (11%)

Nutrition Facts

Serving: 12slices

Amount Per Serving

Calories 885

% Daily Value*

Serving 1slice
Calories 885kcal 44%
Carbohydrates 86g 29%
Protein 17g 34%
Fat 56g 86%
Saturated Fat 22g 110%
Polyunsaturated Fat 12g 71%
Monounsaturated Fat 19g 95%
Trans Fat 1g 50%
Cholesterol 132mg 44%
Sodium 415mg 17%
Potassium 503mg 11%
Fiber 4g 16%
Sugar 57g 114%
Vitamin A 914IU 18%
Vitamin C 1mg 1%
Calcium 134mg 13%
Iron 2mg 11%

* Percent Daily Values are based on a 2,000 calorie diet.