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Southern Sweet Onion Casserole

Southern Sweet Onion Casserole - Comfort Food Bliss Awaits

Southern Sweet Onion Casserole is a creamy, cheesy delight perfect for family dinners or celebrations.
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Prep Time 15 minutes
Cook Time 35 minutes
Resting Time 5 minutes
Total Time 55 minutes
Servings: 8 slices
Course: Dinner
Cuisine: Southern
Calories: 300
Ingredients Equipment Method Nutrition Notes

Ingredients
  

For the Casserole
  • 4 cups Sweet Onions Use Vidalia or similar sweet onions for the best flavor.
  • 2 tablespoons Unsalted Butter Substitutable with olive oil for a lighter version.
  • 1 teaspoon Salt Adjust to taste.
  • 1/2 teaspoon Black Pepper Can be substituted with white pepper if desired.
  • 1 teaspoon Sugar Optional; may omit if preferred.
  • 2 cups Sharp Cheddar Cheese Brings a rich, tangy flavor; substitute with mild cheddar or a blend of cheeses.
  • 1 cup Mozzarella Cheese Gruyère can be used for a more distinct taste.
  • 1 cup Sour Cream Substitute with Greek yogurt for a lighter option.
  • 2 large Eggs Ensure they are well beaten for even distribution.
For the Topping
  • 1 cup Crushed Butter Crackers Ritz crackers are traditional; panko breadcrumbs may be used for extra crispiness.
  • 2 tablespoons Melted Butter Can be replaced with olive oil if preferred.

Equipment

  • large skillet
  • Mixing Bowl
  • 9x13-inch baking dish

Method
 

Step-by-Step Instructions
  1. Thinly slice the sweet onions. In a skillet, melt 2 tablespoons of unsalted butter over medium heat. Add onions, salt, black pepper, and optional sugar. Sauté for about 15 minutes until soft and lightly golden.
  2. In a mixing bowl, whisk together 2 beaten eggs, 1 cup of sour cream, and a teaspoon of salt. Fold in half of the sharp cheddar cheese and 1 cup of mozzarella cheese.
  3. Gently fold the sautéed onions into the custard mixture. Ensure even distribution.
  4. Preheat oven to 350°F (175°C). Pour onion and custard mixture into a greased 9x13-inch baking dish. Sprinkle remaining cheese on top, then add topping mix.
  5. Bake uncovered for 30–35 minutes until golden brown and bubbly. Cover loosely with foil if the topping browns too quickly.
  6. Let the casserole rest for 5 minutes before serving. Slice into squares.

Nutrition

Serving: 1sliceCalories: 300kcalCarbohydrates: 25gProtein: 10gFat: 20gSaturated Fat: 10gPolyunsaturated Fat: 2gMonounsaturated Fat: 8gCholesterol: 100mgSodium: 600mgPotassium: 300mgFiber: 1gSugar: 3gVitamin A: 500IUVitamin C: 10mgCalcium: 250mgIron: 1.5mg

Notes

Leftovers can stay fresh for up to 4 days; reheat in the oven to maintain texture. For longer storage, freeze for up to 2 months. Thaw overnight in the fridge before reheating.

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