3/4 cup heavy cream
3/4 cup yogurt
1/4 tsp. syrup (strawberry, raspberry, or blueberry syrup)
Put all ingredients into a 1 pint whipper. Please make sure that the syrup does not contain any seeds or fruit pulp! Screw on 1 cream charger and shake vigorously. The quantity of syrup can be reduced or increased to taste.