Peanut Butter Cake

Directions

1. 1
   Preheat oven to 350 F. Prepare 18x13 rimmed baking sheet pan with nonstick baking spray or by buttering and lightly flouring the pan, ensuring that the pan is well-coated and discarding any excess flour.
2. 2
   Add butter, water, and peanut butter to a medium-size saucepan over medium heat. Stirring frequently, bring to a boil.
3. 3
   Remove from heat.
4. 4
   Whisk in flour, sugar, salt and baking soda until just combined.
5. 5
   Add in eggs, vanilla and buttermilk.
6. 6
   Pour into prepared sheet pan and bake 20 minutes, or until the cake springs back to the touch and a toothpick when inserted into the center comes out clean.