1 cup white chocolate chips
1 tbsp. red food coloring
2 1/2 tbsp. cocoa powder
1 tsp. cornstarch
1/2 tsp. baking soda
1 1/3 cups all-purpose flour
1 tbsp. buttermilk
1/4 tsp. espresso powder, optional
1/2 tsp. salt
1 1/2 tsp. vanilla extract
1 egg
1/2 cup sugar
1/2 cup brown sugar
1/2 cup butter, softened