Texas Sheet Cake with Chocolate Fudge Frosting - Paula Deen

Ingredients

• 1 cup Boiling water
• 1/3 cup sifted, plus 1/2 cup unsweetened cocoa powder
• 2 sticks melted unsalted butter
• 2 large lightly beaten eggs
• 1/2 cup buttermilk
• 3 teaspoons divided vanilla extract
• 2 cups all purpose flour
• 1 cup packed light brown sugar
• 2 cups divided granulated sugar
• 1 teaspoon baking soda
• 3/4 teaspoon salt
• 1/2 teaspoon baking powder
• 4 1/2 tablespoons cut into small bits Butter
• 2 tablespoons light corn syrup
• 4 cups sifted confectioner's sugar
• 1/2 cup whole milk