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Southern Sweet Onion Casserole

Southern Sweet Onion Casserole: Your New Favorite Comfort Dish

This Southern Sweet Onion Casserole is a crowd-pleasing side dish that combines sweet onions, creamy cheese, and a crispy topping, making it a comforting addition to any meal.
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Prep Time 15 minutes
Cook Time 35 minutes
Resting Time 5 minutes
Total Time 55 minutes
Servings: 8 servings
Course: Dinner
Cuisine: Southern
Calories: 350
Ingredients Equipment Method Nutrition Notes

Ingredients
  

For the Base
  • 4 cups Sweet Onions Vidalia or sweet variety recommended
  • 4 tablespoons Unsalted Butter For sautéing onions
  • 1 teaspoon Salt To taste
  • 1 teaspoon Black Pepper Fresh ground preferred
  • 1 tablespoon Sugar Optional, can be omitted
For the Cheese Mixture
  • 2 cups Sharp Cheddar Cheese Can substitute with medium cheddar
  • 1 cup Mozzarella Cheese Substitute with Monterey Jack or Gruyère
  • 1 cup Sour Cream Greek yogurt can be used
  • 3 large Eggs Beaten
For the Topping
  • 1 cup Crushed Butter Crackers Ritz crackers preferred
  • 2 tablespoons Melted Butter For topping

Equipment

  • Skillet
  • Baking Dish

Method
 

Step-by-Step Instructions
  1. Thinly slice the sweet onions and sauté them in melted butter over medium heat with a sprinkle of salt and pepper for about 15 minutes until softened and lightly golden.
  2. Remove the skillet from heat and stir in sour cream and beaten eggs until smooth. Fold in sharp cheddar and mozzarella cheeses.
  3. Pour the onion and cheese mixture into a greased 9x13-inch baking dish, and top with remaining cheeses and crushed crackers mixed with melted butter.
  4. Preheat oven to 350°F (175°C) and bake uncovered for 30-35 minutes until golden brown and bubbly.
  5. Let the casserole rest for 5 minutes before serving.

Nutrition

Serving: 1sliceCalories: 350kcalCarbohydrates: 25gProtein: 8gFat: 26gSaturated Fat: 15gPolyunsaturated Fat: 1gMonounsaturated Fat: 5gCholesterol: 100mgSodium: 600mgPotassium: 200mgFiber: 1gSugar: 3gVitamin A: 500IUVitamin C: 5mgCalcium: 250mgIron: 1mg

Notes

For best results, caramelize onions slowly and avoid reheating in the microwave to maintain crispy topping.

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