INGREDIENTS
3
Eggs, large
1/4 cup
Mayonnaise
8 oz
All-purpose flour
1 tsp
Baking powder
1 1/4 tsp
Baking soda
2 cups
Brown sugar, packed dark
1 lb
Chocolate, semisweet
2 1/4 oz
Dutch-processed cocoa, unsweetened powder
1 tsp
Kosher salt
2 tsp
Vanilla extract, pure
7 oz
Butter, unsalted
1 1/2 cups
Buttermilk
2 cups
Heavy cream