This footage reveals what happens as dough proofs from a view that bakers normally can’t see. As the dough ferments and proofs, the bubbles expand. Each bubble behaves like a little gluten balloon that inflates as gases of several kinds seep into the interior and then expand in response to the gas pressure. This view also allows us to see how dough changes as it goes from being underproofed to fully proofed to overproofed. To create this shot, a proofing basket was cut in half and then outfitted with a piece of clear plexiglass that was coated in rain repellant to prevent dough from sticking as it rose.