INGREDIENTS
1
Egg, large
1
Egg yolk
1 3/4 cups
All-purpose flour
1/2 tsp
Baking soda
3/4 cup
Brown sugar, packed dark
3 oz
Chocolate chips, semisweet
3/4 cup
Cocoa powder, unsweetened
1 1/4 tsp
Kosher salt
3 1/4 cups
Powdered sugar
1
Sea salt flakes
1
Sprinkles
1/2 cup
Sugar
1 2/3 tbsp
Vanilla, pure
1/4 tsp
Espresso, powder
28 tbsp
Butter, unsalted
3 tbsp
Heavy cream or milk
3 oz
Milk chocolate chunks or chips, plus a bit more for sprinkling over the top