INGREDIENTS
3/4 cup
butter (unsalted, softened)
1/2 cup
light brown sugar
1/2 cup
dark brown sugar
1
large egg
1
large egg yolk
2 tsp
vanilla extract
2 cups
flour
2 tsp
cornstarch
1 tsp
baking soda
1/2 tsp
salt
1 1/2 cups
chocolate chips
1/2 cup
butter (salted, softened)
4 cups
powdered sugar
1/2 cup
unsweetened dark chocolate cocoa powder
1/2 tsp
vanilla extract
1/3 cup
water (boiling)
sprinkles or mini chocolate chips ((for decorating))