Preheat the oven to 350 F. Line a 12 cup muffin pan with paper liners. In a large bowl, whisk together flour, sugar, cocoa powder, salt, and baking soda. Add in the melted butter, eggs, and vanilla extract, and mix until smooth.
In a medium bowl, whisk together flour, salt, and baking soda. In a large bowl, combine butter with sugar until fluffy. Add in egg and mint extract, and mix until smooth.
Add in the flour mixture, mix until it is fully combined. Add in the green food coloring and mix until it is fully green. Fold in the chocolate chips.
Evenly divide the brownie batter between the prepared muffin pan. Top each one with the cookie dough. Bake for 20-25 minutes.
