INGREDIENTS
1/2 cup
butter, softened
3/4 cup
brown sugar
1
large egg, room temperature
1 tsp
vanilla extract
1 cup
all-purpose flour
1/2 cup
+ 2 Tablespoons unsweetened cocoa powder
1 tsp
baking soda
1/2 tsp
salt
1 tsp
corn starch
1/2 cup
white chocolate chips
3/4 cup
semi sweet chocolate chips