Corn Au Gratin

If you’re searching for the ultimate creamy, cheesy side dish, this Corn Au Gratin recipe is the answer. Made with sweet corn, cream-style corn, buttery onions, and topped with a golden Parmesan-crouton crust, it’s the perfect balance of comfort and flavor.

This dish feels indulgent, yet it’s made with simple pantry staples you probably already have on hand.

Corn au gratin is one of those recipes that makes any meal feel special. Whether you’re serving it for Thanksgiving dinner, adding it to your Christmas menu, or making it for a weeknight family dinner, it’s guaranteed to impress.

The texture is luscious and creamy on the inside, with just the right crunch on top to keep every bite interesting. Pair it with roasted chicken, grilled steak, or even a hearty pasta dish for a complete meal.

This recipe also reheats beautifully, making it a great choice for meal prep or holiday leftovers. And if you love easy and comforting side dishes, you’ll also want to check out my Garlic Parmesan Roasted Potatoes and Oven-Baked Potato Wedges—both are reader favorites!

Ingredients

1 medium onion, chopped
3 tablespoons butter
1 teaspoon minced garlic
1 package frozen corn (16 oz)
1 can cream-style corn (15 oz)
1 ½ tablespoons garlic salt
1 cup milk (plus more if needed)
1 ½ tablespoons flour
1 tablespoon sugar
1 cup Parmesan cheese
1 cup Texas toast croutons, crushed

Instructions

Sauté the onion & garlic – In a heavy skillet, melt the butter and add the chopped onion. Cook until light golden brown. Stir in the garlic and cook for 2 minutes until fragrant.
Add the corn – Stir in frozen corn, cream-style corn, and garlic salt. Mix until everything is evenly combined.
Make it creamy – Pour in the milk and sprinkle the flour right on top. Stir until smooth and blended. If lumps remain, don’t worry—they’ll bake out in the oven.
Season & simmer – Add the sugar and stir well. Let the mixture simmer on medium-low for 10 minutes, stirring often. Add extra milk if needed to keep it creamy.
Prepare the casserole – Butter a small casserole dish, then pour the corn mixture in and smooth the top.
Top it off – Sprinkle the Parmesan cheese and crushed croutons evenly over the top.
Bake – Place the casserole into a preheated 400°F oven and bake for 15 minutes, or until golden and bubbly.
Serve – Let cool slightly, then serve warm as the perfect side dish.

Tips & Variations

Cheese swaps: Try shredded cheddar, Gruyère, or a blend of cheeses for a different flavor profile.
Extra crunch: Use Ritz crackers or panko breadcrumbs instead of croutons.
Make ahead: Assemble the casserole, cover, and refrigerate up to a day in advance. Bake just before serving.
Spice it up: Add a pinch of cayenne or smoked paprika for a little extra flavor.

Why You’ll Love This Corn Au Gratin

Easy to make: A one-skillet recipe that comes together quickly.
Crowd-pleasing: A guaranteed hit at family dinners and holiday gatherings.
Versatile: Works alongside chicken, beef, pork, or as part of a vegetarian spread.

If you love cozy, classic comfort food sides like this one, you’ll also enjoy my Copycat Pizza Hut Breadsticks and Fried Pickle Dip. Both recipes are quick, flavorful, and guaranteed to disappear fast at your next get-together.

Serving Suggestions

Corn au gratin shines brightest during the holiday season, but don’t stop there. It’s just as delicious with summer BBQ favorites or paired with a simple weeknight roast. Serve it alongside my Baked Ziti for a full meal that will have everyone coming back for seconds.

This recipe also makes a beautiful addition to your fall aesthetic holiday table—just look at that golden crust and creamy center!

This Corn Au Gratin recipe is one you’ll want to save and make again and again. It’s rich, flavorful, and makes any meal feel like a celebration. Once you try it, it’ll become a family tradition in your kitchen.

Corn Au Gratin