Peanut Butter Sheet Cake is a moist sheet cake topped with a super creamy and sweet peanut butter icing. It is a peanut butter lover’s dream and perfect for potlucks and picnics. Peanut butter is practically the only food I can eat every single day and not get tired of. I often start my day with a banana and a spoon full of peanut butter. I absolutely love the stuff. Normally when it comes to desserts, I prefer peanut butter paired with chocolate. AKA the best thing ever. But sometimes a pure peanut butter dessert is just what I’m craving. With peanut butter in the cake batter and the icing, there’s plenty of peanut butter flavor in this peanut butter sheet cake. It’s like the peanut butter version of a Texas Sheet Cake. Super Moist Cake Batter Too often peanut butter cake is dry in texture. This one is super moist. Be sure to measure the flour correctly and use a shelf-stable creamy peanut butter such as Jif or Skippy. Light and Fluffy Peanut Butter Frosting The frosting is what makes this dessert truly amazing. The addition of two tablespoons of instant vanilla pudding mixture creates a wonderful texture in the frosting and helps stabilize it. How To Serve It’s baked in a 10×15-inch pan and can easily be cut into 20 pieces so it is perfect for bringing to a summer potluck or picnic. If you want to dress it up a little, cut it into squares and then place a mini peanut butter cup on top of each one. Recipe Tips I use salted butter for this recipe. If you use unsalted, you may want to increase the amount of salt added to half a teaspoon. If you don’t have buttermilk you can make a substitute for buttermilk by adding half a tablespoon of lemon juice or vinegar to a liquid measuring cup. Then add milk to the half cup mark. Stir and let sit for 5 minutes. How To Store Peanut Butter Sheet Cake This cake can be stored at room temperature for 4 days. It can also be frozen for up to 3 months. Never miss a recipe. Follow Spicy Southern Kitchen on Pinterest and Facebook. More Peanut Butter Desserts Peanut Butter Pie Peanut Butter Brownies Peanut Buter Fudge Peanut Butter Bundt Cake Double Frosted Peanut Butter Brownies Print Peanut Butter Sheet Cake Peanut Butter Sheet Cake is a moist sheet cake topped with a super creamy and sweet peanut butter icing. Perfect for potlucks! Course DessertCuisine Southern Prep Time 20 minutes minutesCook Time 22 minutes minutesTotal Time 42 minutes minutes Servings 20 servings Calories 469kcal Author Christin Mahrlig Equipment10×15-inch sheet pan IngredientsCake2 cups all-purpose flour2 cups sugar1/2 teaspoon baking soda1/4 teaspoon salt1 1/2 (12 tablespoons) sticks butter1 cup water1/2 cup peanut butter1/4 cup vegetable oil2 eggs1/2 cup buttermilk1 teaspoon vanilla extractFrosting2 sticks (1 cup) butter, softened3/4 cup peanut butter3 cups confectioners’ sugar3 to 4 tablespoons milk2 tablespoons instant vanilla pudding mix InstructionsPreheat oven to 350 degrees. Grease a 10x15x1 inch jellyroll pan.In a large bowl, whisk together flour, sugar, baking soda, and salt.Combine 1 1/2 sticks butter and 1 cup water in a medium saucepan and bring to a simmer. Sitr to make sure all butter is melted.Whisk 1/2 cup peanut butter and vegetable oil into butter mixture. Stir into flour mixture.Whisk together eggs, buttermilk, and vanilla extract. Stir into flour mixture until well combined.Pour batter into prepared pan.Bake for 22 to 26 minutes or until a toothpick inserted in middle comes out clean. Let cool.To make frosting, use an electric mixer to beat butter and peanut butter together until smooth.Add half of confectioners’ sugar and half of milk and beat until smooth.Add remaining confectioners’ sugar, milk and the vanilla pudding mix and beat until smooth. Add a little more milk if necessary.Spread frosting on cake. Video NutritionCalories: 469kcal | Carbohydrates: 53g | Protein: 6g | Fat: 27g | Saturated Fat: 9g | Polyunsaturated Fat: 6g | Monounsaturated Fat: 10g | Trans Fat: 2g | Cholesterol: 42mg | Sodium: 275mg | Potassium: 127mg | Fiber: 1g | Sugar: 41g | Vitamin A: 321IU | Calcium: 26mg | Iron: 1mgWant to Save This Recipe?Save This Recipe Originally posted July 14, 2016. More Potluck Desserts Butterfinger Lush Pineapple Sheet Cake Disclosure: This post contains affiliate links. The post Peanut Butter Sheet Cake appeared first on Spicy Southern Kitchen.