Bake this irresistible Easy Onion Tart at home. Made with sour cream, onion soup, eggs and swiss cheese. Easy step-by-step instructions included.
This Easy Onion Tart relies on simple, everyday ingredients such as sour cream, eggs, beaten, grated swiss cheese and (9 inch) baked pastry shells. It comes together quickly and makes 4 servings, at about 357 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 Easy Onion Tart 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