Sheet Pan Salmon Casserole: Easiest Weeknight Dinner

January 13, 2026

By:

Sheet pan salmon casserole is the answer to busy weeknights and comforting family meals. This one pan wonder simplifies dinner without sacrificing flavor or nutrition. My grandmother, bless her heart, always had a casserole ready, but it involved so many dishes! This version uses one sheet pan, reducing cleanup and making it truly a weeknight hero. It’s become a staple in my kitchen, and I’m excited to share my recipe for *sheet pan salmon casserole* with you.

Why You Will Love This sheet pan salmon casserole Recipe

This recipe is pure comfort food, elevated with the freshness of salmon and the convenience of a sheet pan. Forget spending hours in the kitchen after a long day! This sheet pan salmon casserole comes together quickly and easily. It’s truly a complete meal in one pan, saving you time and effort.

Imagine tender flakes of salmon nestled amongst creamy vegetables. The top is perfectly golden brown and bubbly. Each bite is a symphony of flavors and textures. This recipe is special because it brings all those delicious elements together in a simple, satisfying way. The minimal cleanup is just a bonus!

Cooking salmon on a sheet pan helps distribute the heat evenly, ensuring perfectly cooked salmon every time. If you love quick and easy dinners, you might also enjoy my Sheet Pan Salmon Wraps.

Close-up detail

Ingredients Needed for This sheet pan salmon casserole Recipe

Salmon: 1.5 pounds salmon fillet, skin on or off, cut into 4 equal portions
Broccoli Florets: 2 cups fresh broccoli florets
Cauliflower Florets: 2 cups fresh cauliflower florets
Carrots: 2 medium carrots, peeled and sliced
Onion: 1 medium yellow onion, chopped
Cream of Mushroom Soup: 1 (10.75 ounce) can condensed cream of mushroom soup
Milk: 1/2 cup milk
Cheddar Cheese: 1 cup shredded cheddar cheese
Bread Crumbs: 1 cup panko bread crumbs
Butter: 2 tablespoons melted butter
Olive Oil: 2 tablespoons olive oil
Salt: 1/2 teaspoon or to taste
Black Pepper: 1/4 teaspoon or to taste
Dried Dill: 1 teaspoon
Garlic Powder: 1/2 teaspoon

How to Make This sheet pan salmon casserole Recipe

1. Preheat your oven to 375°F (190°C). Lightly grease a large sheet pan with olive oil.
2. In a large bowl, combine the broccoli florets, cauliflower florets, carrots, and chopped onion. Drizzle with the remaining olive oil, and season with salt, pepper, garlic powder, and dried dill. Toss to coat evenly.
3. Spread the vegetable mixture in an even layer on the prepared sheet pan.
4. Place the salmon fillets on top of the vegetables. Sprinkle the salmon with a little extra salt and pepper.
5. In a separate bowl, whisk together the cream of mushroom soup and milk until smooth.
6. Pour the soup mixture evenly over the salmon and vegetables.
7. In a small bowl, combine the shredded cheddar cheese and panko bread crumbs. Drizzle with the melted butter and toss until the bread crumbs are evenly coated.
8. Sprinkle the cheese and bread crumb mixture over the entire casserole.
9. Bake for 25 to 30 minutes, or until the salmon is cooked through and flakes easily with a fork, and the topping is golden brown and bubbly.
10. Let the casserole rest for 5 minutes before serving. This allows the flavors to meld together a bit.

If you’re looking for something a bit different, check out my recipe for Sheet Pan Beef Casserole.

How to Serve This sheet pan salmon casserole Recipe

This sheet pan salmon casserole is a complete meal on its own, but you can also serve it with a side salad or some crusty bread for dipping into the creamy sauce. A sprinkle of fresh parsley or dill adds a touch of freshness. For a more substantial meal, consider serving alongside a scoop of quinoa or brown rice.

How to Store This sheet pan salmon casserole Recipe

Allow the casserole to cool completely before storing. Transfer leftover sheet pan salmon casserole to an airtight container and refrigerate for up to 3 days. For longer storage, you can freeze the casserole.

To freeze, divide the cooled casserole into individual portions and wrap tightly in plastic wrap, then place in freezer bags. Freeze for up to 2 months. Thaw overnight in the refrigerator before reheating.

Reheat in the oven at 350°F (175°C) until heated through, or in the microwave for a quick and easy meal.

Tips to Make This sheet pan salmon casserole Recipe

Ingredient Swaps: Feel free to substitute other vegetables in this recipe. Green beans, peas, or asparagus would all work well. You can also use different types of cheeses, like mozzarella or Gruyere.
Success Tip: Don’t overcrowd the sheet pan. If necessary, use two sheet pans to ensure even cooking.
Common Mistake to Avoid: Overcooking the salmon. Salmon is best when cooked to medium, or until it flakes easily with a fork.
Pro Tip: For a crispier topping, broil the casserole for the last minute or two of cooking time, watching carefully to prevent burning.

Helpful Notes for This sheet pan salmon casserole Recipe

For best results, use fresh salmon fillet. Frozen salmon can also be used, but make sure to thaw it completely and pat it dry before cooking. Feel free to adjust the amount of seasoning to your liking. If you prefer a spicier casserole, add a pinch of red pepper flakes to the vegetable mixture. A squeeze of lemon juice over the finished dish brightens the flavors.

Variation of This sheet pan salmon casserole Recipe

Seasonal Twist: In the fall, try adding butternut squash or sweet potatoes to the vegetable mixture.
Optional Version: For a richer casserole, use heavy cream instead of milk in the soup mixture.
Creative Modification: Add a layer of thinly sliced potatoes to the bottom of the sheet pan for a heartier casserole. Ensure the sliced potatoes are thinly sliced so they can be softened during the cooking process.

What ingredients do I need for sheet pan salmon casserole?

Typically, you’ll need salmon fillets, vegetables (like broccoli, asparagus, or potatoes), a creamy sauce base (such as cream cheese or yogurt), cheese, and seasonings. Adjust the ingredients to your liking!

How long does it take to cook sheet pan salmon casserole?

Sheet pan salmon casserole usually takes around 20-25 minutes to bake in a preheated oven at 400°F (200°C). Be sure to check the salmon for doneness, it should flake easily with a fork.

Can I prepare sheet pan salmon casserole ahead of time?

Yes, you can assemble the casserole ahead of time and store it in the refrigerator for up to 24 hours before baking. Add any cheese topping just before baking to prevent it from becoming soggy.

What vegetables work best with sheet pan salmon casserole?

Broccoli, asparagus, bell peppers, potatoes, and zucchini are all great options. Choose vegetables that cook within a similar timeframe as the salmon to ensure even cooking.

How do I prevent my sheet pan salmon casserole from being dry?

Make sure to use a generous amount of creamy sauce and avoid overcooking the salmon. Using skin-on salmon can also help retain moisture during baking.

Conclusion

I hope you’ll try this easy and delicious sheet pan salmon casserole! It’s a fantastic way to get a healthy and comforting meal on the table quickly. Let me know in the comments if you gave this recipe a try and what you thought of it! Enjoy this simple way to prepare sheet pan salmon casserole, and happy cooking!