01 - Spread the all-purpose flour evenly on a rimmed baking sheet and bake at 350°F for 5 minutes to eliminate any harmful bacteria. Let cool completely before proceeding.
02 - In a medium bowl, whisk together the heat-treated flour, unsweetened cocoa powder, and salt until uniformly blended.
03 - In a large bowl, beat the softened unsalted butter, granulated sugar, and packed light brown sugar together using an electric mixer or whisk until the mixture is pale, light, and creamy.
04 - Pour in the whole milk, vanilla extract, and red food coloring. Beat until the color is evenly distributed and the mixture is smooth.
05 - Gradually add the dry ingredient mixture to the wet ingredients, folding and mixing until just combined. Avoid overmixing to keep the dough tender.
06 - Using a spatula, gently fold the white chocolate chips into the dough until evenly dispersed throughout.
07 - Enjoy the cookie dough immediately at room temperature, or transfer to an airtight container and refrigerate for up to 5 days.