In a large mixing bowl, combine butter and sugar. Mix for 3-4 minutes or until it’s pale and fluffy.
Add vinegar and mix until combined. Add the egg until combined. Scrape down the sides of the mixing bowl. Add vanilla and red food coloring and combine.
Then add half the flour, cocoa, cornstarch, baking powder and salt. Scrape down the sides and the bottom of the mixing bowl. Once fully combined, add the rest of the flour and mix until everything is incorporated. Mix in the white chocolate chips.
Line cookie sheet with parchment paper or silpat mats.
Roll dough into ping pong sized balls and place on cookie sheet 2 inches apart.
Bake for 9-11 minutes.
Notes
I know that using parchment paper or silicone mats is a newish addition to baking, but not too new. It is honestly a genius tool that any baker can use that will help achieve the best results when baking. Even if it is one little added step.