Texas Sheet Cake
["2 sticks butter", "4 Tbsp. cocoa", "1/2 tsp. salt", "1 tsp. baking soda", "1 c. water", "2 c. flour", "2 c. sugar", "2 eggs", "1/2 c. sour cream"]
["Bring the butter, water, and cocoa to a boil.", "Add flour, salt, sugar, and baking soda all at once.", "Cream well.", "Add eggs and sour cream.", "Bake in greased and floured jelly roll pan (15 x 10-inch) for about 20 minutes at 350\u00b0."]
["butter", "cocoa", "salt", "baking soda", "water", "flour", "sugar", "eggs", "sour cream"]