Preheat the oven to 350F then line a large baking sheet with parchement paper and set aside.
In a medium bowl, mix the flour, corn starch, cocoa powder, baking soda, and salt together and set aside.
In a large bowl, cream the butter, brown sugar and granulated sugar together.
Add in the egg, vanilla extract, vinegar, and red gel food coloring and mix until combined.
Add in thedry mixture and mix just until the flour mixture disappears. Fold in the white chocolate chips.
Using a large cookie scooper, scoop out 8 equally sized cookies dough balls. Pull each cookie dough ball in half then press the two pieces together, keeping the jagged-edge side facing up (check the photos) then place on the lined baking sheet.
Bake the cookies in the preheated oven for 9 minutes then let them cool down on the baking sheet for 10 minutes before transferring to a cooling rack.
Enjoy with a tall glass of cold milk!