If you know what is good for you, then you know that an apple a day keeps the doctor away. Well another healthy tip is that butter and sugar a day keeps the doctor away. 🙂

In all seriousness I was craving a peanut butter recipe, so I tried a peanut butter sheet cake. Super simple and extremely delicious, in fact it gets tastier with every bite!

A picture before I cut it and served it.

pnb sheet cake lace

2 cups all-purpose flour
2 cups white sugar
1/2 teaspoon baking soda
1/4 teaspoon salt
1 cup water
3/4 cup butter or margarine, softened
1/2 cup peanut butter
1/4 cup vegetable oil
2 eggs
1/2 cup buttermilk
1 teaspoon vanilla extract

2/3 cup white sugar
1/3 cup evaporated milk
1 tablespoon butter or margarine
1/3 cup chunky (or regular) peanut butter
1/3 cup miniature marshmallows
1/2 teaspoon vanilla extract

Preheat the oven to 350 degrees F (175 degrees C).
Grease a 10x15x1 inch jellyroll pan/cookie sheet with raised edges.
In a large bowl, stir together the flour, 2 cups sugar, baking soda and salt.
Set aside.

Combine the water and 3/4 cup of butter in a saucepan, and bring to a boil.
Remove from the heat and stir in 1/2 cup peanut butter and vegetable oil until well blended.
Stir this mixture into the dry ingredients.

Combine the eggs, buttermilk and vanilla; stir into the peanut butter mixture until well blended. Spread the batter evenly in the prepared pan.

Bake for 18 to 26 minutes in the preheated oven. Once it is slightly golden on the edges I would suggest removing it from the oven, or until a toothpick inserted near the center comes out clean.
While the cake bakes, place 2/3 cup sugar, evaporated milk, and butter in a saucepan.

Bring to a boil, stirring constantly. Cook stirring for 2 minutes.
Remove from heat and stir in the peanut butter, marshmallows and vanilla until marshmallows are melted and the mixture is smooth.

Finally spoon the frosting over the warm cake and spread in an even layer. Allow to cool before cutting and serving.

*Tip: This cake can sit out for a few days if it is covered in foil or plastic wrap. Be sure to microwave the slice of cake for about 15-20 seconds before you indulge and it will take FABULOUS!