Pin It The first time I made this creamy tomato basil soup with grilled cheese croutons, my kitchen smelled like a cozy little lunchtime café. I hadn't set out to make comfort food that day—it happened when I realized there were rainclouds rolling in, and my curiosity got the best of me. The sizzle of onions in olive oil is always a promising beginning. I’m convinced that basil, when it hits hot tomatoes, could lift anyone’s spirits. Not to mention, tiny golden grilled cheese cubes floating in a bowl are as joyful as they sound.
One night last February, I served this up as a surprise dinner for my partner after a long, soggy commute home. While the soup finished simmering, we debated over which cheese made the best crouton—sharp cheddar ended up winning us over that evening, but the laughter kept the competition close.
Ingredients
- Olive oil: Choose a mellow, fruity oil—it softens onion quickly and gives the soup a rounded base.
- Yellow onion: Diced small so it melts into the soup; don’t skip this, it’s the backbone of the flavor.
- Garlic cloves: Three is the magic number—mince fresh for the best aroma.
- Crushed tomatoes: Go for good quality cans since they truly set the overall taste.
- Vegetable broth: Using low sodium lets you control the saltiness at the end.
- Sugar: Just a teaspoon cuts the acid and brings out sweetness in the tomatoes.
- Salt and black pepper: Taste as you go—add a pinch more if needed after blending.
- Dried oregano: Only half a teaspoon, since too much will overpower the basil.
- Heavy cream: Stir it in at the end for a velvety texture; don’t boil after or it can split.
- Fresh basil leaves: Chop just before adding so the basil flavor stays bright.
- Sourdough or country bread: Day-old is even better for holding its shape as croutons.
- Unsalted butter: Softened makes evenly crispy bread, use just enough to coat.
- Sharp cheddar cheese: Slice thick for oozy, tangy filling—experiment with other melty cheeses too.
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Instructions
- Sweat the aromatics:
- Warm the olive oil in a large pot and scatter in the onion, stirring until it turns translucent and smells sweet.
- Add the garlic:
- Toss in the minced garlic and stir for a minute, just until it releases that unmistakable, mouthwatering scent.
- Create your simmer:
- Pour in tomatoes, broth, sugar, salt, pepper, and oregano; bring it all to a happy bubble and simmer uncovered for 15 minutes.
- Finish with cream and basil:
- Take the pot off the heat, then fold in heavy cream and chopped basil, watching the color swirl and the aroma bloom.
- Blend until smooth:
- Use an immersion blender right in the pot (or transfer carefully) to puree until the soup is luxuriously smooth, then keep it warm on the stove.
- Make grilled cheese croutons:
- Butter the bread slices, layer thick cheddar between two halves, and grill on a hot skillet until crisp and gold, flipping once; let cool for a few minutes before cutting into bite-size cubes.
- Assemble and serve:
- Ladle soup into deep bowls, scatter a generous handful of croutons on top, and tuck in with extra basil if you have it handy.
Pin It On a lazy Sunday, a friend dropped by just as I cut the sandwiches into cubes. We ended up eating them straight off the cutting board, dipping each crispy square into the steaming tomato soup and laughing like kids at recess—sometimes the best meals catch you off guard.
Getting Croutons Extra Crispy
To make sure the grilled cheese croutons don’t get soggy, let the sandwich cool a couple of minutes before slicing so the cheese sets. Using day-old bread gives you the best crunch, and I always press the sandwich slightly in the pan for deep golden sides.
Choosing the Right Tomatoes
Not all canned tomatoes are created equal. If you can, splurge on a brand with Italian plum tomatoes—the difference is both in the flavor and the vibrant red hue that makes the soup look as good as it tastes.
Serving & Storing Leftovers
This soup reheats beautifully, thickening a little more each time—just add a splash of broth when warming up. Keep the croutons separate if you have leftovers; crisp them in the oven for a few minutes to bring them back to life.
- Blend soup in batches if your blender is small.
- Taste before serving to adjust salt and pepper as needed.
- Add extra basil for a fresh burst just before serving.
Pin It Whether you’re making this for a rainy day or just because you crave a bowl of comfort, don’t be surprised if it becomes your go-to, too. Soup and grilled cheese croutons are never just for kids.
Questions & Answers
- → Can I make this dairy-free?
Yes. Swap heavy cream for full-fat coconut milk and use vegan butter and cheese for the grilled croutons. The coconut milk keeps the soup creamy while remaining plant-based.
- → What blender should I use to puree the soup?
An immersion blender is quickest and safe directly in the pot; alternatively, blend in batches in a countertop blender, taking care with hot liquid and venting the lid slightly.
- → How do I keep the grilled cheese croutons crisp?
Grill the sandwiches until deeply golden and cool slightly before cutting into cubes. Place croutons on a rack rather than a plate to avoid steam softening them.
- → Can I adjust the soup texture?
For a chunkier finish, reserve a portion of the tomatoes before blending and stir them back in. For silkier texture, blend longer and strain through a fine-mesh sieve.
- → How long will the soup keep in the fridge?
Stored in an airtight container, it will keep 3–4 days. Reheat gently over low heat and stir in a splash of broth or milk if it thickens.
- → Any tips to brighten the flavor?
Stir in a teaspoon of sugar to balance acidity, finish with extra chopped basil, and add a squeeze of lemon or a few red pepper flakes for lift and complexity.
