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Southern Sweet Onion Casserole

This Southern Sweet Onion Casserole transforms tender Vidalia onions into a creamy, cheesy delight with a crispy, buttery cracker topping. It’s a comforting family dish that’s perfect for both casual dinners and special gatherings.
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Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 4 servings
Course: Main Course
Cuisine: American
Calories: 485
Ingredients Equipment Method Notes

Ingredients
  

  • 4 large Sweet Onions Vidalias are ideal; thinly sliced
  • 4 tablespoons Halal Butter for cooking in the skillet
  • 1 teaspoon Salt
  • ½ teaspoon Black Pepper
  • 1 teaspoon Sugar optional, enhances the natural sweetness
  • 1 cup Sour Cream
  • 2 large Eggs lightly beaten
  • 1 cup Shredded Sharp Cheddar Cheese divided (½ cup folded into filling and ½ cup sprinkled on top)
  • ½ cup Shredded Mozzarella Cheese
  • 1 cup Crushed Halal Butter Crackers
  • 2 tablespoons Halal Butter melted for topping

Equipment

  • Large skillet
  • 9x13-inch baking dish
  • Small bowl
  • Oven

Method
 

  1. Preheat your oven to 350°F (175°C).
  2. In a large skillet over medium heat, melt 4 tablespoons of halal butter. Add the 4 thinly sliced sweet onions along with 1 teaspoon of salt, ½ teaspoon of black pepper, and 1 teaspoon of sugar (optional).
  3. Cook the onions for about 15 minutes, stirring frequently, until they are soft and take on a light golden, caramelized hue.
  4. Remove the skillet from the heat. Stir in 1 cup of sour cream and 2 lightly beaten eggs until smooth, then gently fold in ½ cup of shredded sharp cheddar and all of the ½ cup of shredded mozzarella cheese.
  5. Transfer the onion mixture into a greased 9×13-inch baking dish, spreading it evenly, and sprinkle the remaining ½ cup of sharp cheddar cheese evenly over the top.
  6. In a small bowl, combine 1 cup of crushed halal butter crackers with 2 tablespoons of melted halal butter until the crumbs are evenly moistened. Sprinkle this crispy topping over the casserole.
  7. Bake in the preheated oven for 25-30 minutes, or until the top turns golden brown and the edges start bubbling.
  8. Allow the casserole to rest for about 5 minutes before serving to let it set.

Notes

This casserole is a comforting dish that highlights the natural sweetness of Vidalia or other sweet onions, combined with a creamy, cheesy filling and a uniquely crisp cracker topping. It offers plenty of room for substitutions, such as using alternative onions, dairy-free ingredients, or gluten-free crackers based on your dietary needs. The dish pairs well with grilled or roasted meats and a fresh salad, making it versatile enough for weeknight dinners or holiday gatherings. Leftovers can be stored in an airtight container in the refrigerator for up to two days and reheated in the oven for best results.