Follow these simple steps to create your amazing Peanut Butter Sheet Cake:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease and flour a 9×13-inch baking pan.
2. Mix Dry Ingredients: In a large bowl, sift together the flour, granulated sugar, cocoa powder, baking powder, and salt.
3. Combine Wet Ingredients: In another bowl, whisk together the milk, vegetable oil, eggs, vanilla extract, and peanut butter until well combined.
4. Combine Mixtures: Gradually add the wet ingredients to the dry ingredients, stirring until the batter is smooth and well mixed.
5. Pour Batter: Pour the batter into the prepared baking pan, spreading it evenly.
6. Bake: Place in the preheated oven and bake for 25-30 minutes, or until a toothpick inserted in the center comes out clean.
7. Cool the Cake: Remove from the oven and allow the cake to cool in the pan for 15-20 minutes. Then transfer it to a wire rack to cool completely.
8. Prepare Frosting: In a bowl, mix the powdered sugar and 2 tablespoons of milk to create a smooth frosting. Adjust the consistency as needed.
9. Frost the Cake: Once the cake is completely cool, spread the frosting evenly over the top.
10. Garnish: If desired, sprinkle chopped peanuts over the frosting for an extra crunch.

By following these steps, you’ll create a Peanut Butter Sheet Cake that is not only delicious but also incredibly rewarding to make.