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.
Notes
Mix-In Options: Chopped pecans or walnuts, dark, milk, or white chocolate chips, caramel bits, butterscotch chips, peanut butter chips or mini Reese’s cups, or toffee bits. Mix in about 3/4-1 cup of the mix-in option right into the brownie batter.Storing: If you’re planning on serving it right away, you can leave it in an airtight container right on the countertop for 1 to 2 days. To keep for longer, store it in the refrigerator. It should stay good for up to 5 days, just make sure to keep it air-tight.