Black Walnut Sheet Cake - Hammons Black Walnuts

Ingredients

• 2 cups sugar
• 2 cups flour
• 1 tsp. soda
• 1/2 tsp. salt
• 2 sticks margarine
• 4 Tbsp. cocoa
• 1 cup water
• 1/2 cup buttermilk
• 2 eggs
• 1 stick butter
• 6 Tbsp. buttermilk
• 1 cup Hammons Black Walnuts
• 1 lb. powdered sugar