1 package (18 to 21 oz. box) fudge brownie mix
1-1/4 cup all-purpose flour
1/4 cup packed brown sugar
2 whole eggs
1/2 cup butter, melted and cooled
2 tablespoons milk, or more as needed
1 cup dark chocolate chunks
Whisk together brownie mix, flour, and sugar. Using a heavy spoon, stir in the eggs one at a time, followed by butter and 2 tablespoons milk. If the batter appears like there is too much flour, add 1 more tablespoon of milk. Batter will be very thick. Fold in chocolate chunks. Cover and refrigerate for 2 hours. Preheat oven to 350 degrees. Grease a cookie sheet. Drop heaping tablespoons of dough on the cookie sheet. You want pretty thick cookies here to get the brownie feel, about 3 inches apart. Press down slightly. Don't flatten completely. Bake for 8-10 minutes. Remove from oven, allow to cool 2 minutes on cookie sheet. Transfer to a cooling rack to cool completely. Makes 20 cookies.