Chocolate Sheet Cakes Recipe
Ingredients Vegetable-oil cooking spray 3 cups unbleached all-purpose flour, plus more for pans 1 1/2 cups unsweetened cocoa powder 3 cups sugar 1 tablespoon baking soda 1 1/2 teaspoons baking powder 1 1/2 teaspoons kosher salt 4 large eggs 1 1/2 cups buttermilk 1 1/2 cups warm water 6 tablespoons safflower oil 2 teaspoons pure vanilla extract Preparation Preheat oven to 350 degrees. Spray two 9-by-13-inch baking pans with cooking spray....