Description
A rich and creamy onion casserole topped with melted cheese and buttery breadcrumbs, perfect for a comforting side dish.
Ingredients
Scale
- 4 large yellow onions, thinly sliced
- 3 tablespoons butter
- 1 cup sour cream
- 1 cup grated cheddar cheese
- 1/2 cup grated Parmesan cheese
- 1/2 cup mayonnaise
- 1/2 teaspoon garlic powder
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 1 cup crushed buttery crackers (e.g., Ritz)
- 2 tablespoons melted butter
Instructions
- Preheat oven to 350°F (175°C).
- In a large skillet, melt 3 tablespoons butter over medium heat. Add sliced onions and cook, stirring occasionally, until very soft and golden, about 20 minutes.
- In a bowl, combine sour cream, cheddar cheese, Parmesan cheese, mayonnaise, garlic powder, salt, and pepper. Stir in the cooked onions.
- Transfer the mixture to a greased 1.5-quart baking dish.
- In a small bowl, mix crushed crackers with 2 tablespoons melted butter; sprinkle over the casserole.
- Bake for 25-30 minutes until bubbly and golden on top. Let rest 5 minutes before serving.
Notes
For extra richness, you can substitute half the sour cream with cream cheese. This casserole can be assembled a day ahead and refrigerated before baking.
Nutrition
- Calories: 320 kcal
- Sugar: 6 g
- Fat: 25 g
- Carbohydrates: 18 g
- Protein: 8 g