Enjoy the rich flavors of caramelized sweet onions combined with creamy cheese and crunchy bread crumbs in this delicious Sweet Onion Casserole. This comforting dish is perfect for a family dinner or special occasion. With just a handful of ingredients and a little time in the oven, you can whip up a tasty casserole that will leave everyone asking for seconds. Try this recipe today and bring a burst of flavor to your dinner table.
Ingredients
- 4 large sweet onions
- 1/4 cup unsalted butter
- 2 cups shredded cheddar cheese
- 1 cup bread crumbs
- 1/2 cup mayonnaise
- 1/2 cup sour cream
- 1 teaspoon dried thyme
- 1/2 teaspoon garlic powder
- Salt and pepper to taste
Directions
- Preheat the oven to 375°F (190°C).
- Peel and slice the onions into rings.
- In a large skillet, melt the butter over medium heat.
- Add the onions and cook until caramelized, stirring occasionally, for about 20 minutes.
- In a separate bowl, combine the mayonnaise, sour cream, dried thyme, garlic powder, salt, and pepper.
- Grease a casserole dish with butter or cooking spray.
- Layer half of the caramelized onions in the bottom of the dish.
- Spread half of the mayonnaise mixture over the onions.
- Sprinkle half of the shredded cheddar cheese on top.
- Repeat the layers with the remaining onions, mayonnaise mixture, and cheese.
- Top the casserole with bread crumbs.
- Bake in the preheated oven for 25 minutes or until the cheese is melted and bubbly.
- Allow the casserole to cool for a few minutes before serving.
- Garnish with fresh thyme leaves, if desired, and enjoy!
Interesting Facts
Caramelizing the onions brings out their natural sweetness and adds a depth of flavor to the casserole.
You can customize this casserole by adding cooked bacon or sautéed mushrooms for extra flavor.
Leftovers can be stored in an airtight container in the refrigerator for up to 3 days.