polly's chocolate sheet cake

Ingredients For polly's chocolate sheet cake

• 2 c

  sugar
• 2 c

  all purpose flour
• 1/3 c

  cocoa powder
• 1 tsp

  baking soda
• 1/2 tsp

  sea salt
• 1 c

  ( 2 stick's ) butter
• 1 c

  water
• 1/2 c

  buttermilk
• 2

  eggs
• 1 tsp

  vanilla
• 1/2 c

  (1 stick ) butter for frosting
• 1/4 c

  cocoa powder for frosting
• 6 Tbsp

  milk for frosting
• 4 c

  ( 1 lb. ) powdered sugar for frosting
• 1 c

  chopped nuts for frosting