Preheat the oven to 350° and grease a 9-inch pie baking dish.
Gently unroll the refrigerated pie crust and fit it into the pie dish.
Whisk together the ingredients for brownie batter in a mixing bowl until smooth. (If using nuts, chocolate chips, or caramel bits, fold it into the batter.)
Pour the batter into the pie crust and spread it evenly.
For gooier center, bake brownie pie for 33-35 minutes. For a brownie that is more done, cook for about 45 minutes.
Let the pie rest for 10-15 minutes before cutting.