Description
This Peanut Butter Sheet Cake with Peanut Butter Frosting is a peanut butter lover’s dream! Made with a yellow cake mix base and loaded with creamy peanut butter flavor, this soft and moist cake is topped with a luscious peanut butter frosting. Perfect for potlucks, parties, or whenever you’re craving a sweet, nutty treat!
Ingredients
For the Cake:
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1 box yellow cake mix
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4 large eggs
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1/2 cup softened butter (1 stick)
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1 cup creamy peanut butter
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1 cup milk
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1 teaspoon vanilla extract
For the Peanut Butter Frosting:
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1/2 cup creamy peanut butter
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1/4 cup softened butter
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2 cups powdered sugar
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3-4 tablespoons milk (adjust to desired consistency)
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1 teaspoon vanilla extract
Instructions
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Preheat Oven:
Preheat to 350°F (175°C). Grease and lightly flour a 9×13-inch baking pan. -
Make the Cake Batter:
In a large mixing bowl, combine cake mix, eggs, softened butter, peanut butter, milk, and vanilla extract.
Beat on medium speed for 2–3 minutes until smooth. -
Bake the Cake:
Pour batter into prepared pan and spread evenly.
Bake for 25–30 minutes, or until a toothpick inserted in the center comes out clean.
Let cool completely on a wire rack. -
Prepare Frosting:
In a medium bowl, beat peanut butter and butter until creamy.
Gradually add powdered sugar and beat until combined.
Mix in milk, one tablespoon at a time, until desired consistency is reached.
Stir in vanilla extract. -
Frost and Serve:
Spread frosting over the cooled cake.
Slice into squares and serve for a deliciously rich peanut butter treat!
Notes
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For extra flair, top with crushed peanuts, chocolate chips, or a drizzle of melted chocolate.
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Store covered at room temperature for up to 3 days or refrigerate for longer freshness.
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This cake freezes well—wrap tightly and thaw before serving.
- Prep Time: 15 minutes
- Cook Time: 25 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
