My Momma's Beer Bread

Ingredients
3 cups self rising flour or 4 cups Bisquick
3 tablespoons sugar
12 ounces beer ( bottle or can)
1/2 cup butter or 1/2 cup margarine, to spread across top
Directions
Mix all ingredients except butter.
Spread in greased and floured 9x5x3-inch loaf pan.
Bake in preheated 375°F oven for 45 to 60 minutes depending upon how brown you want it.
Take out and rub butter across top to melt.