Whisk together the dry ingredients in a large bowl - bread flour, all purpose flour, cocoa powder, cornstarch, baking soda, baking powder, and kosher salt. 1 1/2 cups Bread Flour1 1/2 cups All Purpose Flour6 tbsp Natural / Unsweetened Cocoa Powder1 tbsp Cornstarch1 tsp Baking Soda1/2 tsp Baking Powder1 tsp Kosher Salt
Add room temperature butter, sugar, brown sugar, and red food coloring to the bowl of a stand mixer fitted with the paddle attachment. Mix on medium speed for 3-4 minutes, until the mixture is smooth and lightened in color. Scrape down the sides of the bowl and add in the egg, eggs, and vanilla extract. Continue to mix on low speed for about 1 minute, until combined. 1 1/4 cups Salted Butter3/4 cup Granulated Sugar1 cup Light Brown Sugar1 tbsp Red Gel Food Coloring1 large Eggs2 Egg Yolks1 tbsp Vanilla Extract
Add in the vinegar and sour cream and mix until fully incorporated, about 20 seconds. 1 tbsp Vinegar1 tbsp Sour Cream
Add in the dry ingredients and mix on medium low speed until combined and a dough forms, about 30 seconds. Use a flat spatula to fold in the white chocolate chips and semi-sweet chocolate chips. 1 cup White Chocolate Chips1 1/2 cups Semi-Sweet Chocolate Chips
Line a baking sheet with parchment paper. Measure out 6oz cook dough balls, about 8-9 cookies. (do not roll into a ball) Refrigerate uncovered for 2-4 hours, until cold throughout.
Preheat the oven to 375 degrees F. Bake 3 cookies at a time, 4 inches apart, for 14-17 minutes (14 minutes for a gooey cookies, 17 minutes for a more crispy cookie).
Fresh out of the oven, use a small bowl to scoot around the cookies in a circular motion to create the perfect circular cookie. Allow the cookies to cool on the baking sheet for 15 minutes, then remove onto a wire rack to cool completely.
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Notes
Don’t skip the vinegar. You won’t taste it, promise! The vinegar just boosts the cocoa flavor and makes the cookies tender and vibrant.
Measure flour like a pro. Spoon and level your flours (or weigh them) so your cookies don’t turn out dry or dense. Too much flour = cakey sadness.
Use gel food coloring. Liquid coloring can thin the dough. Gel gives bold color without messing with texture.
Quality cocoa powder make a big difference! It’s subtle, but better cocoa gives better flavor.
Underbake slightly. Take them out when centers look soft. They’ll set as they cool and stay chewy instead of dry.