INGREDIENTS
1 cup
butter, softened
3/4 cup
white sugar
3/4 cup
packed brown sugar
2
eggs, divided
1 tsp
vanilla extract
2 cups
all-purpose flour
1/2 cup
dark cocoa powder
1 tsp
baking soda
1/2 tsp
salt
1 cup
chopped walnuts
1 cup
white chocolate chips
1 cup
semisweet chocolate chips