Preheat the Oven: Preheat oven to 350°F. Line a baking sheet with parchment paper for easy cleanup and even browning.
Cream Butter + Cream Cheese: In a stand mixer fitted with the paddle attachment (or with a hand mixer), beat 1/2 cup unsalted butter and 4 ounces cream cheese together on medium-high speed for about 1 minute until light, fluffy, and smooth. There should be no visible lumps of cream cheese.
Add Milk + Vinegar: Add the 3 tablespoons whole milk and 1 teaspoon distilled white vinegar. Mix for 30 seconds until fully incorporated. The mixture may look a little fluffy and creamy. Perfect!
Add Cake Mix: Reduce mixer speed to low. Sprinkle 1 box (15.25 ounces) red velvet cake mix over the wet ingredients and mix until just combined, scraping the sides of the bowl as needed. The dough will be thick and a little sticky. This is normal.
Fold in the Chips: Add the 3/4 cup white chocolate chips and fold with a spatula until evenly distributed.
Scoop + Shape: Using a medium cookie scoop (about 2 tablespoons), portion dough onto the prepared baking sheet 2 inches apart. Use your fingers to gently flatten each scoop to about 1/2 inch thick for even baking.
Bake: Bake for 10 minutes. The tops should be set but the centers will still be soft. They firm up as they cool. Do not wait for browning; red velvet should stay vibrant.
Finishing Touch: Right after removing the cookies from the oven, press extra white chocolate chips into the top of each cookie. This keeps them bright white instead of browning in the oven.
Cool: Let cookies stand on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.
Notes
Room Temperature Ingredients: Your butter, cream cheese, and milk MUST be room temp for smooth blending. Cold cream cheese leads to lumps; cold butter won’t cream properly.Sticky Dough Help: If dough is too sticky to scoop, chill for 15–20 minutes. You can also lightly flour your fingertips.Don’t Overbake: Red velvet cookies should stay soft! Overbaking makes them dry and cakey.Storage: Store in an airtight container at room temperature for up to 3 days or freeze for up to 3 months.