Bake this irresistible Katie'S Jam Bars at home. Made with yellow cake, butter, oats and water. Easy step-by-step instructions included.
This Katie'S Jam Bars relies on simple, everyday ingredients such as yellow cake mix, butter, quick oats and small jar jam. It comes together quickly and makes 4 servings, at about 887 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.
Whether you're rounding off a family dinner, bringing a treat to a gathering, or simply satisfying a sweet craving, this Katie'S Jam Bars delivers. Serve it warm or at room temperature, and add a scoop of ice cream or a spoonful of whipped cream for an extra-special finish.
Updated Jun 30, 2026