Description
- Learn how to make a delicious Cheesy Baked Onion Casserole with sweet onions, creamy cheese, and savory herbs
Ingredients
Scale
- 1 tsp dried thyme
- 1 tsp dried parsley
- 1 tsp garlic powder
- ½ tsp dried oregano
- ½ tsp salt
- ¼ tsp black pepper
- ¼ tsp mustard powder
- ¼ cup unsalted butter
- 3–4 large sweet onions (e.g., Vidalia), peeled
- 1 cup sharp cheddar cheese, shredded
- 1 cup mozzarella cheese, shredded
- ½ cup Parmesan cheese, grated
Instructions
- Prepare the Oven and Dish:
- Preheat your oven to 350°F (175°C). Lightly grease a 9×13-inch baking dish with butter or non-stick spray.
- Mix the Seasonings:
- In a large mixing bowl, combine the thyme, parsley, garlic powder, oregano, salt, black pepper, and mustard powder. Stir until evenly blended.
- Slice and Season the Onions:
- Slice the onions into ¼-inch-thick rounds and separate them into rings. Toss the rings into the bowl of spices, making sure they are coated well. Transfer them into the greased baking dish, spreading them out as evenly as possible.
- Add Butter and Cheese:
- Slice the butter into small pieces and distribute them evenly over the seasoned onions. Sprinkle the cheddar, mozzarella, and Parmesan cheeses across the top.
- Bake to Perfection:
- Place the dish in the preheated oven and bake for 35–40 minutes, or until the onions are tender and the cheese is melted, bubbling, and golden. For a crispy finish, switch to the broil setting for the last 2–3 minutes.
- Serve and Enjoy:
- Remove the dish from the oven and let it cool for about 5 minutes before serving warm. Pair it with your favorite main dishes or enjoy it as a comforting side.
Notes
- Layering Tip: Don’t worry if the onion rings overlap in the dish—just ensure the butter and cheese are evenly spread on top.
- Cheese Tips: For the creamiest texture, shred cheese directly from a block instead of using pre-shredded varieties. Experiment with cheeses like Gruyere or Gouda for a unique twist.
- Spice It Up: Add a sprinkle of red pepper flakes for a touch of heat if desired.
- Enjoy this savory and cheesy baked onion delight!
- Prep Time: 15 minutes
- Cook Time: 30 minutes
Nutrition
- Serving Size: 6 servings
- Calories: 250 kcal per serving
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