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If you are craving that ultimate comfort food combo that never fails to warm your heart and make your taste buds sing, you simply must try this Tomato Soup & Grilled Cheese Casserole Recipe. It takes the nostalgic duo of creamy tomato soup and perfectly toasted grilled cheese sandwiches, then transforms them into a cozy, layered casserole that’s bursting with cheesy goodness and rich, savory flavor. This dish is a total game-changer that’s both simple to make and irresistibly delicious, perfect for lazy afternoons or comforting family dinners.

Ingredients You’ll Need
Getting your ingredients together for this casserole is a breeze, and each item plays an important role in making the dish truly special. From the melty sharp cheddar that creates those golden, gooey bites to the savory tomato soup that adds depth and warmth, every element works in unison to build this harmonious flavor experience.
- 6 slices of bread (sourdough or white): Choose a sturdy bread that crisps up well for a perfect grilled cheese texture.
- 4 tbsp butter: Essential for that golden crust on the bread and rich buttery flavor in each bite.
- 6 oz cream cheese (optional): Adds extra creaminess and tang to the grilled cheese, creating luscious layers.
- 12 slices sharp cheddar cheese: The hero cheese that melts beautifully, adding sharp, tangy flavor throughout.
- 1 can (10.75 oz) condensed tomato soup: The cozy base of the casserole that infuses it with that classic tomato soup taste.
- ½ cup tomato juice: Lightens the soup mixture, making it smooth and more pourable for layering.
- 2 large eggs: Bind everything together creating a wonderful custardy texture in the casserole.
- ½ tsp garlic powder: Adds a subtle savory boost without overpowering the delicate tomato flavor.
- 1 tsp Italian seasoning: Brings an herby note that complements the tomato and cheese perfectly.
- ½ cup diced tomatoes (optional): Freshens up the mixture with bursts of juicy tomato goodness.
- 1 cup shredded Italian blend cheese: A melty, cheesy topping that browns up beautifully and seals the deal.
How to Make Tomato Soup & Grilled Cheese Casserole Recipe
Step 1: Preheat Your Oven
Start by preheating your oven to a high 450°F (230°C). This intense heat is key for grilling your sandwiches to a perfectly crispy golden finish, setting the stage for that delicious layered casserole.
Step 2: Prepare the Grilled Cheese Sandwiches
Butter each slice of bread generously—this is what creates the irresistible crunch. Then assemble your grilled cheese sandwiches by layering sharp cheddar slices, and if you want to treat yourself, add cream cheese for extra creaminess. The combination is pure indulgence.
Step 3: Bake and Cube the Sandwiches
Bake the sandwiches in the hot oven for 12 to 14 minutes, flipping them halfway through to achieve an even toast on both sides. Once done, let them cool just enough, then cut into 1-inch cubes. These bite-sized grilled cheeses are going to add delightful texture and flavors in every spoonful.
Step 4: Lower the Oven Temperature
After your sandwiches are baked and cubed, reduce your oven heat to 350°F (175°C). This gentler temperature is perfect for baking the casserole through without drying it out.
Step 5: Whisk Together the Soup Mixture
In a mixing bowl, combine the condensed tomato soup, tomato juice, eggs, garlic powder, and Italian seasoning. Whisk thoroughly until smooth and well incorporated. If you’re including diced tomatoes, fold them in now for that fresh burst of flavor throughout the casserole.
Step 6: Pour the Soup Mixture into the Baking Dish
Lightly grease a 9×13” baking dish to prevent sticking, then pour in your soup mixture evenly. This flavorful base will soak into the grilled cheese cubes, marrying all the flavors in the most wonderful way.
Step 7: Layer the Grilled Cheese Cubes
Scatter the cubed grilled cheese sandwiches across the surface of the soup mixture. Gently press them down so they absorb some of the liquid but still hold their shape, creating those irresistible pockets of cheesy toast throughout the casserole.
Step 8: Top with Cheese and Bake
Sprinkle the shredded Italian blend cheese evenly over the top. Pop the dish back into the oven and bake at 350°F for 25 to 30 minutes until it’s bubbly, golden, and absolutely mouthwatering. That golden crust on top is the perfect finishing touch!
How to Serve Tomato Soup & Grilled Cheese Casserole Recipe
Garnishes
A sprinkle of fresh chopped basil or parsley adds a pop of color and a burst of freshness that balances out the richness perfectly. For a little extra zing, a drizzle of high-quality olive oil or a few red pepper flakes can raise your casserole from delicious to unforgettable.
Side Dishes
This casserole is a meal in itself, but pairing it with a crisp green salad or some roasted vegetables can add a light, refreshing contrast to the cheesy, creamy main attraction. A simple arugula salad with lemon vinaigrette is a fantastic choice to brighten the plate.
Creative Ways to Present
For a fun twist, serve individual portions in ramekins for a personalized experience. You can also sprinkle extra shredded cheese on top before broiling for a bubbly, crunchy crust that wows your guests visually and flavorful-wise. Adding edible flowers or microgreens as garnish makes it feel extra special for dinner parties or cozy weekends.
Make Ahead and Storage
Storing Leftovers
You can keep any leftover Tomato Soup & Grilled Cheese Casserole Recipe covered in the refrigerator for up to 3 days. Be sure to cover it tightly with plastic wrap or foil to maintain freshness and prevent it from drying out.
Freezing
This casserole freezes really well! After baking, allow it to cool completely, then portion it into airtight containers or freezer-safe bags. It can be frozen for up to 2 months. To enjoy, thaw overnight in the fridge before reheating.
Reheating
For the best texture, reheat leftovers in a conventional oven at 350°F for around 15-20 minutes until warmed through and bubbly again. Microwaving is quicker but may result in a softer crust. To re-crisp, finish under the broiler for a couple minutes while watching carefully.
FAQs
Can I use a different type of bread for the casserole?
Absolutely! While sourdough or white bread is recommended for their texture and flavor, you can experiment with whole wheat or rye bread. Just make sure the bread is sturdy enough to hold up when baked and won’t become too soggy.
Is it necessary to include the cream cheese?
Not at all. The cream cheese is optional and adds an extra layer of creaminess and tang, but the casserole is delicious with just sharp cheddar cheese if you prefer a simpler version.
Can I make this recipe vegetarian?
Yes! This recipe is naturally vegetarian since it contains no meat. Just double-check that your cheese and soup ingredients do not contain animal-derived rennet or broth if you want it strictly vegetarian.
How can I make this casserole gluten-free?
Simply swap the regular bread for your favorite gluten-free bread. Many gluten-free breads toast wonderfully and will work well in this recipe without compromising flavor or texture.
Can I prepare parts of this casserole in advance?
You can absolutely assemble the grilled cheese sandwiches and soup mixture ahead of time. Bake the sandwiches and cube them, then store them separately in the fridge. When ready, assemble and bake the casserole for a quick and tasty meal.
Final Thoughts
This Tomato Soup & Grilled Cheese Casserole Recipe is a true comfort-food masterpiece that brings together two classic favorites in an exciting, new way. Whether you’re feeding a family or just craving some cozy vibes, this casserole is easy to make, endlessly satisfying, and sure to become one of your go-to dishes on chilly days. Give it a try—you’ll be so glad you did!
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Tomato Soup & Grilled Cheese Casserole Recipe
- Prep Time: 15 minutes
- Cook Time: 45 minutes
- Total Time: 1 hour
- Yield: 6 servings
- Category: Casserole
- Method: Baking
- Cuisine: American
Description
This comforting Tomato Soup & Grilled Cheese Casserole combines classic grilled cheese sandwiches with a savory tomato soup base, baked together into a rich, cheesy casserole perfect for a cozy meal. It’s an easy-to-make dish that transforms simple ingredients into a crowd-pleasing comfort food ideal for lunch or dinner.
Ingredients
For the Grilled Cheese Sandwiches
- 6 slices bread (sourdough or white)
- 4 tbsp butter
- 6 oz cream cheese (optional)
- 12 slices sharp cheddar cheese
For the Tomato Soup Mixture
- 1 can (10.75 oz) condensed tomato soup
- ½ cup tomato juice
- 2 large eggs
- ½ tsp garlic powder
- 1 tsp Italian seasoning
- ½ cup diced tomatoes (optional)
Topping
- 1 cup shredded Italian blend cheese
Instructions
- Preheat Oven: Preheat your oven to 450°F (230°C) to prepare for baking the grilled cheese sandwiches.
- Prepare Sandwiches: Butter each slice of bread generously. Assemble grilled cheese sandwiches by layering cheddar cheese slices and optional cream cheese between the bread slices.
- Bake Sandwiches: Place the sandwiches on a baking sheet and bake for 12–14 minutes, flipping once halfway through to ensure even browning. Remove from oven and let cool slightly before cutting into 1-inch cubes.
- Reduce Oven Temperature: Lower the oven temperature to 350°F (175°C) to prepare for baking the casserole.
- Mix Soup Base: In a large bowl, whisk together the condensed tomato soup, tomato juice, eggs, garlic powder, Italian seasoning, and optional diced tomatoes until smooth and well combined.
- Assemble Casserole: Grease a 9×13-inch baking dish lightly. Pour the tomato soup mixture evenly into the dish.
- Add Sandwich Cubes: Layer the cubed grilled cheese sandwiches over the tomato soup mixture, pressing them gently to submerge slightly in the liquid.
- Add Cheese Topping and Bake: Sprinkle the shredded Italian blend cheese evenly over the casserole. Bake in the 350°F oven for 25–30 minutes or until the topping is bubbly and golden brown.
Notes
- Use sourdough bread for a tangier flavor and better texture.
- Adding cream cheese inside the sandwiches enhances creaminess but can be omitted for a lighter version.
- Be sure to flip sandwiches during the initial bake to get an even golden crisp.
- Press the sandwich cubes gently into the soup mixture so they absorb flavor without becoming too soggy.
- If you prefer a spicier kick, add a pinch of cayenne pepper to the soup mixture.
- Serve warm and enjoy with a fresh green salad for a balanced meal.

