Peanut Butter Sheet Cake

Ingredients

• 2 C. all-purpose flour
• 2 C. granulated sugar
• 1 tsp. Clabber Girl® Baking Soda
• ½ tsp. coarse salt
• 1 C. water
• ½ C. unsalted butter
• ½ C. Crisco® All-Vegetable Shortening
• ½ C. peanut butter
• 2 eggs
• ½ C. buttermilk
• 1 tsp. Spice Islands® Pure Vanilla Extract
• 6 Tbsp. unsalted butter
• 2 Tbsp. peanut butter
• 6 Tbsp. milk
• 1 lb. powdered sugar, sifted
• 1 C. chopped peanuts
• ½ tsp. coarse salt (optional)