INGREDIENTS
1 cup
boiling water
3 oz
unsweetened chocolate
1/2 cup
butter
1 tsp
vanilla
2 cups
sugar
2
eggs, separated
1 tsp
baking soda
1/2 cup
sour cream
2 cups
(MINUS 2 Tablespoons) flour, sifted
1 tsp
baking powder
2 tbsp
butter
3/4 cup
semisweet chocolate chips
6 tbsp
whipping cream
1 1/4 cups
powdered sugar, or as needed
1 tsp
vanilla