Bake this irresistible Welsh Onion Cake at home. Made with potatoes, onions, butter and salt. Easy step-by-step instructions included.
This Welsh Onion Cake relies on simple, everyday ingredients such as potatoes, peeled and sliced, onions, finely chopped, butter, melted and salt. It comes together quickly and makes 4 servings, at about 350 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 Welsh Onion Cake 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