Preheat oven to 175°C (350°F).
Line a baking sheet with parchment paper.
In a mixing bowl, combine brownie mix, eggs, and oil.
Stir until a thick, glossy dough forms.
Fold in any optional add-ins.
Scoop tablespoon-sized portions of dough.
Roll lightly or drop directly onto the baking sheet.
Leave space between cookies—they will spread.
Bake for 10–12 minutes.
Edges should be set while centers remain soft.
Do not overbake for that perfect fudgy texture.
Let cookies rest on the tray for 5 minutes, then transfer to a rack.
