A quick cognac-infused coffee sauce tops scoops of frozen yogurt in this adult sundae.
Bring sugar, water and coffee powder to a boil in a small saucepan; boil until slightly thickened, 2 to 3 minutes. Remove from heat; stir in cognac (or brandy). Let cool. Layer in parfait glasses with frozen yogurt.
2 1/2 other carbohydrate