Chocolate Gravy
["1 c. white sugar", "2 1/3 Tbsp. cocoa", "3 Tbsp. flour", "1/4 tsp. salt", "3 1/2 c. milk", "1/2 stick butter"]
["Mix dry ingredients and add milk gradually, stirring until smooth. Melt butter in iron skillet and add mixture; cook until thick."]
["white sugar", "cocoa", "flour", "salt", "milk", "butter"]