Skinny Potato and Onion Bake Earthy potatoes layered with flavorful and aromatic onions. All in a light cheesy sauce.

Skinny Potato and Onion Bake

This Skinny Potato and Onion Bake will become a family favorite side dish for you too. Easy to make and delicious to eat. Earthy potatoes layered with flavorful and aromatic onions. All in a light cheesy sauce. Perfect for holidays or just serving with a weeknight dinner. Want to change the servings of this recipe? Use the servings slider in the recipe card.

Course Side Dish
Cuisine American
Prep Time 30 minutes
Cook Time 1 hour 30 minutes
Total Time 2 hours
Servings 4 servings

Ingredients

  • 3 tablespoons butter divided use
  • 2 large Russet potatoes sliced 1/8-inch thick
  • 2 small to medium yellow onions peeled and sliced 1/8-inch thick
  • ½ cup freshly grated Parmesan
  • ½ cup shredded cheddar cheese
  • salt and pepper
  • ¼ cup whole milk

Instructions

  1. Preheat oven to 325 ° F.
  2. Grease a 2.5 liter, or larger, round casserole dish with 1 tablespoon of the butter. Place a layer of potatoes on the bottom of the dish. Top with a thin layer of onion slices, a little shredded cheese, then season with a pinch of salt and some pepper. Continue in layers like this, gently pressing down as the layers build up, until all ingredients are used, ending with potato slices. Pour the milk over the top, and dot the remaining butter over the top.
  3. Bake for about 1 ½ hours, until the potato feels tender when pierced with a knife. If the dish starts to brown too much, cover it with foil about ½ to 2/3 of the way through the cooking time.

Recipe Notes

This serves 4-6 people