Preheat & Prep: Preheat oven to 350°F (175°C). Line a baking sheet with parchment paper.
Dry Ingredients: Whisk together flour, cocoa powder, baking soda, and salt in a bowl. Set aside.
Cream Butter & Sugar: Beat softened butter and sugar until fluffy (~2 minutes). Add egg, vanilla, and red food coloring; mix until smooth.
Combine: Gradually add dry ingredients to the wet mixture, mixing until just combined. Fold in white chocolate chips.
Scoop Dough: Use a cookie scoop to portion dough (1.5 tbsp per cookie) onto the baking sheet, spacing 2 inches apart.
Bake: Bake for 8–10 minutes (edges should be set, centers slightly soft).
Cool: Let cookies rest on the sheet for 5 minutes, then transfer to a wire rack.