Caramel Sauce - cooking recipe

Ingredients

1 box brown sugar
1 can cream
1/2 stick butter
heaping Tbsp. flour or more
1 egg yolk
1 tsp. vanilla

Preparation

Mix flour with brown sugar; mix a little cream with egg yolk. Beat well.
Mix in milk and butter.
Cook in double boiler until thick.
Add vanilla at end of cooking.