An indoor smoker includes a smoking chamber that is defined at least in part by a chamber wall and a smoke generating assembly for providing a flow of smoke into the smoking chamber through a chamber inlet defined in the chamber wall. A rack assembly is positioned within the smoking chamber and includes a ladder rack mounted to the chamber wall for supporting a plurality of racks. The ladder rack includes L-shaped mounting flanges that are secured to the chamber wall and a support plate that is secured to the distal ends of the mounting flanges to define a flow plenum for distributing the flow of smoke throughout the smoking chamber.