Peanut Butter Sheet Cake with Peanut Butter Frosting
This rich, moist, and ultra-peanut buttery sheet cake is pure comfort food heaven! Topped with a creamy peanut butter frosting, it’s perfect for potlucks, parties, or whenever you need a serious PB fix.
Ingredients
For the Cake:
-
2 cups all-purpose flour
-
2 cups granulated sugar
-
1 tsp baking soda
-
½ tsp salt
-
1 cup water
-
1 cup (2 sticks) unsalted butter
-
½ cup creamy peanut butter
-
2 large eggs
-
½ cup buttermilk (*or ½ cup milk + ½ tbsp vinegar, let sit 5 mins*)
-
1 tsp vanilla extract
For the Peanut Butter Frosting:
-
½ cup (1 stick) unsalted butter, softened
-
1 cup creamy peanut butter
-
3-4 cups powdered sugar
-
¼ cup milk (adjust for consistency)
-
1 tsp vanilla extract
-
Pinch of salt
Optional Toppings:
-
Chopped peanuts
-
Reese’s Pieces or peanut butter cups
-
Chocolate drizzle
Instructions
1. Make the Cake:
-
Preheat oven to 350°F (175°C). Grease a 9×13-inch baking pan.
-
In a large bowl, whisk together flour, sugar, baking soda, and salt.
-
In a saucepan, combine water, butter, and peanut butter. Bring to a boil, then remove from heat.
-
Pour the hot mixture into the dry ingredients and stir until smooth.
-
In a separate bowl, whisk eggs, buttermilk, and vanilla. Add to the batter and mix well.
-
Pour into the prepared pan and bake for 25-30 mins, or until a toothpick comes out clean.
-
Let cool completely before frosting.
2. Make the Frosting:
-
Beat butter and peanut butter until smooth.
-
Gradually add powdered sugar, alternating with milk, until fluffy.
-
Mix in vanilla and salt. Adjust milk if needed for spreadable consistency.
-
Frost the cooled cake and top with chopped peanuts or chocolate drizzle if desired.
Why You’ll Love It:
✔ Super moist from the boiled peanut butter mixture.
✔ Ultra-peanut buttery in both cake and frosting.
✔ Easy to make—no layers, just mix, bake, and frost!
Serve with a glass of cold milk for the ultimate experience. Enjoy! 🥜🍰
Variation: For a chocolate-peanut butter twist, add ½ cup cocoa powder to the dry ingredients or swirl melted chocolate into the frosting!
Would you like a smaller batch or a gluten-free version? Let me know! 😊