This Southern Sweet Onion Casserole is a rich, creamy, and ultra-comforting side dish made with tender sweet onions baked in a buttery, cheesy sauce and topped with a golden, crispy cracker crust — the perfect crowd-pleaser for holidays, potlucks, and Sunday dinners.
Ingredients
- 4 large sweet onions Vidalia-style, thinly sliced
- 3 tablespoons unsalted butter
- 1 teaspoon salt
- ½ teaspoon black pepper
- 1 teaspoon sugar
- 1 cup shredded sharp cheddar cheese
- ½ cup mayonnaise
- ½ cup sour cream
- ½ teaspoon garlic powder
- ½ teaspoon paprika
- 1 cup crushed buttery crackers
- 2 tablespoons melted butter for topping
Instructions
- Preheat oven to 375°F (190°C). Lightly grease a baking dish.
- Soften the onions:
- In a large skillet, melt the 3 tablespoons of butter over medium heat. Add sliced onions, salt, pepper, and sugar. Cook 10–12 minutes until onions are tender and lightly golden. Remove from heat.
- Mix the filling:
- In a bowl, combine mayonnaise, sour cream, garlic powder, paprika, and shredded cheddar. Stir in the cooked onions until evenly coated.
- Assemble:
- Spread the onion mixture into the prepared baking dish.
- Make the topping:
- In a small bowl, mix crushed crackers with the melted butter. Sprinkle evenly over the casserole.
- Bake:
- Place in oven and bake for 30–35 minutes, until bubbly and golden brown on top.
- Rest & serve:
- Let sit for 5 minutes before serving.
