Grandma's Milk Sauce for Waffles (Dorothy)

1 cup of milk
3 tbsp. sugar
1 tbsp. flour
1 tsp butter
1/2 tsp vanilla

In heavy saucepan, heat milk to near boil.  In separate bowl mix sugar and flour with a little cold milk.  Add this to hot milk in saucepan, whisking it in quickly.  Continue heating until sauce has slightly thickened.  Remove from heat and stir in the butter and vanilla.  Serve hot over waffles.