chocolate-peanut butter sheet cake

Ingredients For chocolate-peanut butter sheet cake

• 2 c

  all purpose flour
• 2 c

  sugar
• 1 tsp

  baking soda
• 1/2 tsp

  salt
• 1 c

  water
• 1/2 c

  butter, cubed
• 1/2 c

  creamy peanut butter
• 1/4 c

  baking cocoa
• 3

  eggs
• 1/2 c

  sour cream
• 2 tsp

  vanilla
• FOR THE FROSTING
• 3 c

  powdered sugar
• 1/2 c

  creamy peanut butter
• 1/2 c

  milk
• 1/2 tsp

  vanilla
• 1/2 c

  chopped salted or unsalted peanuts