In a food processor, or by hand, pulse or crush the Ritz Crackers into coarse shards. Then mix in the butter and sugar, either pulsing with your processor or breaking the cubes apart with your fingers until the crackers and butter stick together when squeezed, but the texture remains rough and crumbly.
Press into a 9-inch pie plate, molding bottom and sides to the dish. Bake for about 15 minutes, or until golden and browned, before adding your desired filling, like lemon or banana.