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

In a medium bowl, whisk together 2 1/2 cups all-purpose flour, 1/2 cup unsweetened cocoa powder, 1 tsp baking soda, and 1/2 tsp salt.

In a separate large bowl, beat 1 cup of softened unsalted butter and 1 1/2 cups granulated sugar until light and fluffy.

Incorporate 2 large eggs, 2 tsp vanilla extract, and 1 tbsp red food coloring into the butter mixture.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined. If using chocolate chips, gently fold them in now.

Scoop out portions of dough onto the prepared baking sheets, spacing them about two inches apart.

Bake for about 10 minutes, or until the cookies are puffy and set.