INGREDIENTS
1/2 cup
butter (1 stick), room temperature
3/4
cup Demerara style brown sugar (regular brown sugar is fine too - Demerara creates a richer flavoured cookie)
1
large egg, room temperature
1 tsp
vanilla
1/2 cup
+ 3 tbsps unsweetened cocoa powder
1 tsp
baking soda
1 cup
all purpose flour
1 tsp
cornstarch
1/2 cup
white chocolate chips
3/4 cup
semi-sweet chocolate chips