01 - Preheat the oven to 350°F. Line two baking sheets with parchment paper for easy cleanup and to prevent sticking.
02 - In a medium bowl, whisk together the flour, cocoa powder, baking soda, and salt until well blended. Set aside for later use.
03 - In a large bowl, beat the softened butter, granulated sugar, and brown sugar together until the mixture becomes light and fluffy, approximately 2-3 minutes.
04 - Add the eggs one at a time, beating thoroughly after each addition. Mix in the milk, vanilla extract, vinegar, and green food coloring until completely incorporated and uniform in color.
05 - Gradually add the dry ingredient mixture to the wet ingredients, mixing gently just until combined. Avoid overmixing to prevent tough cookies.
06 - Gently fold the white chocolate chips into the dough using a spatula, ensuring even distribution throughout.
07 - Scoop tablespoon-sized portions of dough onto the prepared baking sheets, arranging them approximately 2 inches apart to allow for spreading during baking.
08 - Bake for 10-12 minutes, or until the edges appear set while the centers remain slightly soft. The cookies should have a gentle dome shape.
09 - Allow the cookies to rest on the baking sheet for 5 minutes before transferring to a wire rack to cool completely. This helps them set properly.