INGREDIENTS
3/4 cup
Egg whites
1 lb
Bittersweet chocolate
12 oz
Chocolate, semisweet
1/4 tsp
Cream of tartar
1 1/2 cups
Granulated sugar
3/4 tsp
Kosher salt
3 tsp
Vanilla extract, pure
3 tsp
Espresso, instant powder
1 1/2
lbs Butter, unsalted
3 tbsp
Rum, dark