INGREDIENTS
3/4 cup
unsalted butter (room temperature)
3/4 cup
brown sugar (packed)
1/4 cup
granulated sugar
1
large egg (room temperature)
2 tsp
vanilla extract
1 1/2 cups
all-purpose flour
1/2 cup
cocoa powder
2 tsp
cornstarch
1 tsp
baking soda
1/2 tsp
kosher salt
1/2 cup
semi-sweet chocolate chips
1/2 cup
white chocolate chips
1/2 cup
chocolate chunks