Country Chocolate Gravy - cooking recipe

Ingredients

1 cup sugar
4 tablespoons all-purpose flour
1 pinch salt
2 tablespoons cocoa (I use Hershey)
3 cups milk, but you can use what u like (better with whole)
1/4 cup butter
1 teaspoon vanilla extract (optional)

Preparation

In a saucepan combine the sugar, flour, salt and cocoa and cook over medium heat. You will be adding the milk before the dry ingredients start to really cook! :) Gradually add the milk. I add 1 Cup at a time stirring. Cook until thick and creamy, stirring constantly. Remove from the heat and THEN then stir in the butter and vanilla. Serve over biscuits. It is sweet!
I am not sure on pricise cook time!