Preheat oven to 350˚F. Line a 12-cup muffin tin with muffin liners and set aside.
In a large bowl, whisk together cocoa powder, all-purpose flour, light brown sugar, baking powder, baking soda, and salt until combined. Set aside.
In a separate medium bowl, whisk together butermilk, eggs, vanilla, and red food coloring.
Add wet ingredients to dry ingredients with the melted butter. Stir until just combined.
Fold in chocolate chips until just incorporated.
Divide the batter evenly between the muffin cups. Bake for 18 to 20 minutes, until cooked through (a toothpick inserted in the center should come out clean).
Remove from oven and cool completely before serving.