Sweet Onion Casserole

Nutriscore Rating: 59/100

Indulge in the rich, savory comfort of our Sweet Onion Casserole—a perfect side dish that transforms simple ingredients into a show-stopping crowd-pleaser. Featuring tender, caramelized sweet onions nestled in a luscious cheddar and cream cheese sauce, this dish is crowned with a crispy buttery cracker topping for the ultimate textural contrast. The addition of hot sauce and spices adds a subtle kick, making every bite irresistibly flavorful and satisfying. Ready in just over an hour, this casserole pairs beautifully with roasted meats or serves as a stand-alone vegetarian delight at any holiday table or weeknight dinner. Whether you’re searching for a cozy family recipe or an impressive dish for entertaining, this Sweet Onion Casserole hits all the right notes for comfort food lovers.

Recipe Information

• Prep Time: 20 min
• Cook Time: 45 min
• Total Time: 1 hr 5 min
• Servings: 6 servings
• Difficulty: Medium

🥘 Ingredients

12 items

• 4 large sweet onions
• 4 tablespoons unsalted butter
• 2 tablespoons all-purpose flour
• 1.5 cups whole milk
• 2 cups sharp cheddar cheese, shredded
• 4 ounces cream cheese, softened
• 0.5 teaspoons hot sauce
• 1 teaspoons salt
• 0.5 teaspoons ground black pepper
• 1.5 cups buttery crackers (e.g., Ritz), crushed
• 2 tablespoons unsalted butter, melted
• 2 tablespoons parsley, chopped (optional for garnish)

📝 Instructions

10 steps

1. Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking dish and set it aside.

2. Peel and thinly slice the sweet onions.

3. In a large skillet, melt 4 tablespoons of butter over medium heat. Add the sliced onions and cook, stirring occasionally, for 20 minutes or until the onions are caramelized and golden brown. Remove from heat and set aside.

4. In a medium saucepan over medium heat, melt 2 tablespoons of butter and whisk in the flour. Cook the flour for 1-2 minutes, stirring constantly, to remove the raw flavor.

5. Gradually whisk in the milk and cook until the mixture thickens and begins to simmer, about 3-5 minutes.

6. Reduce the heat to low and stir in the shredded cheddar cheese, cream cheese, hot sauce, salt, and black pepper. Stir until the cheese is melted and the sauce is smooth.

7. Combine the caramelized onions with the cheese sauce, then pour the mixture into the prepared baking dish.

8. In a small bowl, mix the crushed buttery crackers with the melted butter. Sprinkle this mixture evenly over the onion casserole.

9. Bake in the preheated oven for 25 minutes or until the top is golden brown and bubbling.

10. Remove from the oven and let it rest for 5 minutes before serving. Garnish with chopped parsley if desired.

Nutrition Facts

1 serving (332.3g)

Calories		580
% Daily Value*
Total Fat		39.9 g	51%
	Saturated Fat	22.6 g	113%
	Polyunsaturated Fat	0.0 g
Cholesterol		98 mg	33%
Sodium		953 mg	41%
Total Carbohydrate		42.2 g	15%
	Dietary Fiber	3.7 g	13%
	Total Sugars	14.3 g
Protein		16.9 g	34%
Vitamin D		1.1 mcg	5%
Calcium		407 mg	31%
Iron		2.0 mg	11%
Potassium		427 mg	9%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 2159 cal (60.4%%)

Protein: 403 cal (11.3%%)

Carbs: 1012 cal (28.3%%)