Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper.

Whisk together the flour, cocoa powder, baking soda, and salt in a mixing bowl until well combined.

Cream the softened butter with the granulated and brown sugars in a separate bowl until fluffy and light.

Beat in the large egg and vanilla extract, mixing until fully combined.

Fold in the red food coloring and M&M candies gently.

Drop tablespoonfuls of the cookie dough onto the prepared baking sheets, ensuring they are about two inches apart.

Bake for 10-12 minutes or until the cookies look puffy but are still soft in the center.