Edges look set and slightly pull away from the pan
Center looks just set, not wet or jiggly
A toothpick inserted in the center comes out with moist crumbs, not raw batter
Top appears dry and may have a thin crackly crust
Brownies feel firm around the edges but still slightly soft in the middle
Internal temperature is about 200°F to 205°F
The pan no longer looks glossy with uncooked batter
A gentle shake of the pan shows minimal movement in the center