Proofing is the final rise after shaping the dough and before baking. It is possible to overproof your challah dough, and it can result in collapsed rolls and poor flavor. Don't worry, it's easy to check if your dough is correctly proofed. Simply use your index finger and gently poke the dough. If it slowly springs back when touched, it's perfectly proofed. Over-proofed dough never springs back when it's poked.