Made with just a handful of ingredients, onion casserole still packs quite a tasty punch. Loaded with sweet onions and cheese and topped with buttery crackers, this casserole is a scrumptious side dish that perfectly complements any meal, from grilled meats and fish to roasted veggies. Just be aware that this recipe calls for chopping a lot of onions, so now’s the time to find a pair of goggles and sharpen your knives if you want to prevent those pesky onion-induced tears.
Ingredients for Onion Casserole
- Sweet onions: The sharper your knife, the fewer eye irritants the onion will release. Make sure you’re also cutting under a kitchen vent or fan to further reduce the irritation.
- Butter:Â Sauteing onions in butter adds a rich flavor to the onions that just isn’t the same as oil.
- Butter-flavored crackers:Â Ritz are the best, of course.
- Parmesan cheese: Parmesan adds a deliciously salty undertone to this dish, but feel free to add a different type of cheese, depending on what’s in your fridge.
Directions
Step 1: Saute the onions
Preheat the oven to 350°F. In a large skillet, saute the onions in butter until tender.
Step 2: Assemble the casserole
Place half the onions in a greased 2-quart baking dish, then sprinkle with half the cracker crumbs and cheese. Repeat the layers.
Step 3: Bake the casserole
Bake, uncovered, until golden brown and bubbly, 25 to 30 minutes.
Onion Casserole Variations
- Add meat:Â Lean ground beef would be a good addition to this onion casserole, if you’re trying to turn this side dish into more of a main dish. Cook the beef while you saute the onions, before folding it into the casserole.
- Try it with veggies: Alternatively, you could ramp up the veggies in this casserole. Briefly saute peppers, mushrooms or carrots, then add them in with the onions.
How to Store Onion Casserole
You can store leftover onion casserole in an airtight container in the refrigerator for three to four days.
How long will onion casserole last?
Onion casserole will last three to four days if stored properly in the fridge.
Onion Casserole Tips
What should I serve with onion casserole?
The beauty of this onion casserole recipe is that it goes with virtually anything. Serve it with steak, seafood, pot roast, roasted vegetables or any other main dish.
How can I make onion casserole more filling?
Adding ground beef or more veggies will make this casserole more filling, but it’s also nice to keep things simple and serve it alongside a separate main dish.
Can I serve the casserole itself as a topping?
Yes! This casserole makes for a delicious, crunchy topping for hamburgers and hot dogs (you’ll be the star at the next barbecue).
