A brownie should be slightly underdone when baked. A toothpick inserted into the center should come out with flecks of chocolate. If you bake your brownies for more than 35 minutes, you risk the cake becoming too dry and crumbly. However, you can bake them for a bit longer if you want to keep them longer. You can also store them in the freezer for up to three months if they don't get eaten within the first few days.
This website provides approximate nutrition information for convenience and as a courtesy only. Nutrition data is gathered primarily from the Spoonacular Database, whenever available, or otherwise other online calculators.