Irresistible Peanut Butter Sheet Cake with Creamy Peanut Butter Frosting: A Delicious Delight You Must Try!
If you love peanut butter and crave a dessert that combines rich flavor with a moist, tender crumb, this Peanut Butter Sheet Cake with Peanut Butter Frosting is for you. It’s an easy, crowd-pleasing cake that works for family gatherings, celebrations, or any time you want a comforting treat.
This guide walks you through selecting quality ingredients and using simple baking tips to produce a reliable, delicious result. The recipe is streamlined so you can get the cake in the oven quickly and enjoy minimal cleanup.
Why Choose a Peanut Butter Sheet Cake?
Peanut butter brings a rich, nutty taste and creamy texture that pairs beautifully with a soft sheet cake. This version stands out because it’s:
• Simple: Uses common pantry items and straightforward steps.
• Versatile: Great for birthdays, potlucks, holidays, or an everyday dessert.
• Appealing: Loved by kids and adults alike.
• Economical: Affordable ingredients deliver big flavor.
Sheet cakes also make serving large groups easy—slices are uniform and convenient for events.
Ingredients You’ll Need
Gather these ingredients before you start.
For the Cake:
• ½ cup salted butter, cut into 4 pieces (1 stick)
• ⅔ cup creamy peanut butter
• ⅓ cup milk (any fat level)
• ⅓ cup vegetable oil
• 1 teaspoon vanilla extract
• 2 large eggs
• 1 box yellow cake mix (or Golden Butter)
• ⅓ cup chopped peanuts (for sprinkling)
For the Peanut Butter Frosting:
• ½ cup salted butter, cut into pieces
• ½ cup creamy or crunchy peanut butter
• ⅓ cup milk
• 1 teaspoon vanilla extract
• 1 (16-ounce) box powdered sugar (about 3¾ cups)
Pro Tip: Using a good-quality peanut butter and cake mix improves flavor and texture noticeably.
Prep Time, Cook Time, Total Time, and Servings
• Prep Time: 20 minutes
• Cook Time: 15–21 minutes (depending on pan)
• Total Time: 35–41 minutes
• Servings: 24 slices
Step-by-Step Instructions
1. Preheat the oven: Heat to 350°F (175°C). Lightly grease a 15×10-inch sheet pan or a 13×9-inch baking pan.
2. Make the peanut butter base: In a microwave-safe bowl combine ½ cup butter, ⅔ cup peanut butter, and ⅓ cup milk. Microwave on high for about 1 minute, then stir until smooth. Add ⅓ cup vegetable oil and 1 teaspoon vanilla; mix well.
3. Add the eggs: Stir in 2 large eggs until fully incorporated.
4. Combine with cake mix: Gradually add the box of yellow cake mix, stirring until smooth and free of lumps.
5. Transfer to pan: Spread the batter evenly in the prepared baking pan with a spatula.
6. Bake: For a 15×10-inch sheet pan, bake 13–15 minutes. For a 13×9-inch pan, bake 19–21 minutes. The cake is done when a toothpick inserted near the center comes out almost clean. Avoid overbaking to keep the cake moist.
7. Cool: Let the cake cool in the pan for about 15 minutes so it sets and is easier to frost.
8. Prepare the frosting: Cream together ½ cup butter and ½ cup peanut butter. Add ⅓ cup milk and 1 teaspoon vanilla. Gradually mix in the powdered sugar until smooth and spreadable. If needed, adjust milk or powdered sugar to reach the desired consistency.
9. Frost and finish: Spread the frosting evenly over the cooled cake and sprinkle ⅓ cup chopped peanuts on top for crunch. For the cleanest slices, let the iced cake sit at room temperature for about an hour, or chill for 30 minutes before cutting.
10. Serve: Cut into 24 slices and serve immediately, or store covered in the refrigerator for later.
