Preheat the oven to 350 degrees Fahrenheit. Grease a mini muffin pan with nonstick spray.
Prepare the brownie mix according to the instructions on the back of the box. 15 oz Brownie Mix, Eggs, Oil, and Water
Scoop the brownie mix into each muffin tin spot, filling them each 2/3 of the way full.
Bake for 14 to 17 minutes, or until the edges are firm, and a toothpick inserted in the middle comes out clean.
Remove from the oven and use the back of a teaspoon measuring spoon to lightly indent each of the brownie cups. Let the brownies cool in the pan for 10 minutes.
Carefully remove the brownies, by loosening them in each spot, by running a knife around the edges and transferring them to a wire rack to cool completely.