INGREDIENTS
3
Egg whites plus, Large
5 1/2 oz
Bittersweet chocolate
1
Confectioner's sugar
1 1/2 tbsp
Corn starch
1/8 tsp
Cream of tartar
1/2 cup
Granulated sugar
1/8 tsp
Salt
1/4 tsp
Vanilla extract
2 tbsp
Butter, Unsalted
2/3 cup
Whole milk
3 tbsp
Of sourcream