INGREDIENTS
2 1/4 cups
all-purpose flour
2 1/2 tbsp
cocoa powder
1 1/2 tsp
cornstarch
3/4 tsp
baking soda
1/2 tsp
salt
8 tbsp
butter, at room temperature
6 tbsp
all vegetable shortening
1 1/2 cups
granulated sugar
1
large egg
1
large egg yolk
1 1/2 tsp
white vinegar
1 1/2 tsp
vanilla extract
1 tbsp
red food coloring
1 1/3 cups
white chocolate chips, divided