Print
clock clock iconcutlery cutlery iconflag flag iconfolder folder iconinstagram instagram iconpinterest pinterest iconfacebook facebook iconprint print iconsquares squares iconheart heart iconheart solid heart solid icon

Sweet Onion Casserole (Creamy, Cheesy Southern Comfort Dish)


  • Author: WAFA LI

Ingredients

Scale
  • 34 large sweet onions (Vidalia or Texas), thinly sliced (about 6 cups)
  • 3 tbsp unsalted butter
  • 1 (10.5 oz) can cream of mushroom soup (or cream of onion for extra depth)
  • ½ cup sour cream
  • 1 cup shredded sharp cheddar cheese
  • 1½ cups crushed buttery round crackers (e.g., Ritz or saltines)
  • 2 tbsp chopped fresh parsley (optional)
  • Salt & black pepper to taste

Instructions

  1. Caramelize onions: Melt butter in a large skillet over medium-low heat. Add onions and cook 20–25 minutes, stirring occasionally, until deeply golden and sweet. Season lightly with salt and pepper.
  2. Prep oven: Preheat to 350°F (175°C). Grease a 9×13″ or 2-quart casserole dish.
  3. Make filling: In a bowl, combine caramelized onions, cream of mushroom soup, sour cream, and ½ cup cheddar. Mix gently.
  4. Assemble: Spread mixture into baking dish. Top with remaining ½ cup cheddar.
  5. Add topping: Sprinkle crushed crackers evenly over cheese.
  6. Bake 25–30 minutes, until bubbly and topping is golden brown.
  7. Garnish with parsley if desired. Rest 5 minutes before serving.
💡 Pro Tips:
– Don’t rush the onions—low and slow = maximum sweetness.
– For extra crunch, mix 1 tbsp melted butter into the cracker crumbs before topping.
– Make ahead: Assemble unbaked; refrigerate overnight. Add 5–10 min to bake time.

Prep Time & Nutrition (per serving, serves 8):

Prep Time: 15 min | Cook Time: 30 min | Total Time: 45 min
Servings: 8 | Calories: 210 | Net Carbs: 16g | Fats: 14g | Protein: 6g