INGREDIENTS
1
Egg, large
1 cup
All-purpose flour
1/2 tsp
Baking soda
1/2 cup
Brown sugar, firmly packed light
3/8 cup
Cocoa powder, unsweetened
1/2 cup
Granulated sugar
1/4 tsp
Salt
1
Sea salt or other coarse salt
3 oz
Semisweet or bittersweet chocolate
1/2 tsp
Vanilla extract
10 tbsp
Butter, unsalted