How Long Does Jello Take to Set? With a love for experimenting in the kitchen, I provide practical advice on the art of making Jello. As a self-taught culinary expert, I guide readers on the expected timeframe for Jello to set, drawing from my own trial-and-error experiences. Through easy-to-follow instructions and helpful tips, I empower home cooks to create delightful gelatin treats that are bound to impress.