I’ll never forget the first time I tried making tomato basil soup with grilled cheese croutons in my tiny apartment kitchen. It was one of those rainy evenings when only comfort food would do, but my first attempt was… well, let’s just say the soup was watery and the “croutons” were more like charcoal briquettes. After burning through way too many tomatoes and loaves of bread (and setting off my smoke alarm more times than I’d like to admit), I finally cracked the code for this simple, soul-warming combo. Now it’s my go-to recipe when I need something quick, cozy, and guaranteed to hit the spot – no fancy skills required, just good ingredients and a little patience.
Why You’ll Love This Tomato Basil Soup with Grilled Cheese Croutons
Listen, if I could go back in time and hand this recipe to my younger self – the one eating sad microwave meals in my tiny apartment – it would’ve saved me so many unnecessary takeout nights! Here’s why this combo is magical:
- Done in 30 minutes flat. Perfect for those “I need dinner NOW” emergencies when you’re hangry and exhausted.
- Impossible to mess up. I’ve tested every possible wrong way to make this (believe me), and the soup still tastes amazing.
- Cheap as chips (but way tastier). Canned tomatoes? Day-old bread? This is the budget meal that feels indulgent.
- Like a warm hug in a bowl. That first dunk of crispy-cheesy bread into velvety tomato soup? Total childhood nostalgia.
Trust me, once you make it, it’ll become your secret weapon too.

Ingredients for Tomato Basil Soup with Grilled Cheese Croutons
Okay, let’s gather our simple ingredients – nothing fancy here, just good stuff that works together perfectly. I’ve divided them into two easy groups so you won’t get overwhelmed. Pro tip: measure everything before you start cooking (even if it feels like extra work). You’ll thank yourself later when you’re not frantically chopping onions while your garlic burns!
For the Tomato Basil Soup
- 2 tbsp olive oil (the good stuff you’d dip bread in)
- 1 onion, diced (any color works – I use yellow because they’re cheap)
- 2 cloves garlic, minced (or more if you’re feeling brave)
- 28 oz canned crushed tomatoes (the secret weapon for perfect texture)
- 2 cups vegetable broth (chicken works too if that’s what you have)
- 1/4 cup fresh basil, chopped (trust me, fresh makes all the difference)
- 1/2 tsp salt (adjust to taste – I always sneak a second pinch)
- 1/4 tsp black pepper (freshly ground if you’ve got it)
For the Grilled Cheese Croutons
- 4 slices bread (whatever’s in your pantry – I’ve used everything from sourdough to wheat)
- 1 cup shredded cheddar cheese (pre-shredded is fine – no judgement here!)
- 2 tbsp butter (real butter only – it’s worth those extra calories)
See? Told you it was simple. Now lets make some magic happen!
How to Make Tomato Basil Soup with Grilled Cheese Croutons
Alright, let’s dive in! I promise this is easier than it looks – we’ll tackle the soup first, then those irresistible grilled cheese croutons. Just follow these steps and you’ll be dunking cheesy goodness into velvety tomato soup before you know it!
Making the Tomato Basil Soup
- Start with the aromatics: Heat your olive oil in a large pot over medium heat (not too hot – we’re not frying here!). Add the diced onion and cook until it turns soft and translucent, about 5 minutes. Stir occasionally so it doesn’t burn – I’ve learned that lesson the hard way!
- Garlic time: Toss in your minced garlic and cook for just 1 minute until fragrant. Seriously, don’t walk away here – garlic burns faster than you’d think. Ask me how I know!
- Tomato party: Pour in your crushed tomatoes and vegetable broth. Give it a good stir, bring it to a gentle simmer (little bubbles around the edges), then let it cook uncovered for 15 minutes. This is when all those flavors really get to know each other.
- Finish strong: Stir in your chopped basil, salt, and pepper. Now here’s my favorite part – blending it smooth! Use an immersion blender right in the pot (careful of splatters!) or carefully transfer to a blender in batches. Want it extra silky? Some recipes strain it, but I love the texture as-is.
Crafting the Grilled Cheese Croutons
- Butter up: Spread butter on one side of each bread slice. Yes, both slices that’ll make your sandwich – this is what creates that golden crispiness we all crave.
- Cheese please: Pile shredded cheddar between two slices (buttered sides out, obviously). Don’t be shy with the cheese – those melty pockets are what make these croutons magical.
- Grill to perfection: Cook in a skillet over medium heat for about 3 minutes per side. You’re looking for that perfect golden brown – peek carefully so you don’t burn them. Once cooled slightly, cut into bite-sized squares. Pro tip: Let them sit for a minute before cutting or all that glorious cheese will ooze out!
Now comes the best part – ladle that gorgeous soup into bowls, scatter those crispy-cheesy croutons on top, and dig in while it’s all warm and melty. Pure comfort in every bite!

Tips for the Best Tomato Basil Soup with Grilled Cheese Croutons
After making this recipe more times than I can count (and yes, messing it up plenty too), here are my hard-earned secrets for tomato soup perfection:
- Soup too thin? Simmer it uncovered for 5 extra minutes to thicken. Too thick? Splash in more broth – easy fix!
- Cheese substitutions welcome: No cheddar? Try mozzarella for extra stretch or gouda for smokiness. Even American cheese works in a pinch.
- Garlic guardian: Keep the heat medium-low when sautéing garlic. If it browns even slightly, start over – bitter garlic ruins everything.
- Basil boost: Tear leaves instead of chopping for maximum flavor. No fresh basil? Use 1 tsp dried, but add it with the tomatoes.
- Crouton crisis prevention: Let grilled cheese cool 2 minutes before cutting – hot cheese is like edible lava that burns fingers and makes messy cuts.
Remember – cooking should be fun, not stressful. If something goes wrong, laugh it off and try again tomorrow!

Common Questions About Tomato Basil Soup with Grilled Cheese Croutons
I get asked about this recipe all the time – turns out everyone wants to know the same tricks I learned through trial and error! Here are answers to the questions that pop up most often:
Can I use dried basil instead of fresh?
You totally can in a pinch! Use 1 teaspoon dried basil instead of the 1/4 cup fresh. But here’s the thing – add it with the tomatoes so it has time to soften and release its flavor. Fresh basil added at the end gives that bright pop we love, but dried works better than no basil at all!
How should I store leftovers?
Soup keeps beautifully! Let it cool completely, then store in an airtight container in the fridge for up to 3 days. The croutons? They’re best fresh, but if you must save them, keep them separate in a paper bag (plastic makes them soggy). Reheat soup gently on the stove with a splash of water or broth to thin it out. Some tomato soups taste even better the next day!
Can I freeze the soup?
Absolutely! Freeze the soup (without croutons) in freezer-safe containers for up to 2 months. Thaw overnight in the fridge, then reheat slowly on the stove. The texture might be slightly different after freezing, but the flavor stays delicious. Pro tip: Leave out the cream if you’re adding any – stir that in fresh when reheating.
What if I don’t have an immersion blender?
No worries! Carefully transfer the soup in batches to a regular blender. Just be sure not to fill it more than halfway (hot liquids expand!) and hold the lid down firmly with a towel. Or you know what? Some people love a chunkier tomato soup – you could just skip blending altogether!
Can I make this dairy-free?
Easy peasy! For the soup, just skip any cream additions. For the croutons, use your favorite dairy-free cheese and butter alternatives. The soup itself is naturally vegan until you add those cheesy croutons – so feel free to get creative!
Serving Suggestions for Tomato Basil Soup with Grilled Cheese Croutons
This soup is practically begging for some tasty friends to join the party! My go-to move? A simple green salad with lemon vinaigrette to cut through the richness. If I’m feeling extra hungry (or had a particularly rough day), I’ll add a hunk of crusty bread for maximum dunking action. The beauty is – it’s already a complete meal with those cheesy croutons, so don’t stress about sides unless you really want to!
Nutritional Information for Tomato Basil Soup with Grilled Cheese Croutons
Just so you know, these numbers are ballpark estimates – the actual count depends on your exact ingredients and brands. A typical serving of this comforting combo has a nice balance of carbs, protein, and, let’s be honest, that glorious cheese fat we all love! If you’re curious about specific counts, sites like BBC Good Food have great calculators where you can plug in your exact ingredients for precise numbers. But honestly? Some meals are meant to be enjoyed without overthinking the math!
About the Author
Hi, I’m Hailey – the slightly messy home cook behind this recipe. A few years ago, I couldn’t boil water without setting off the smoke alarm. After one too many sad microwave meals in my tiny apartment, I decided enough was enough. Through countless kitchen disasters (including the infamous “burnt soup incident of 2018”), I taught myself that good food doesn’t need to be complicated.
Now I create simple, tested recipes for fellow beginners who just want meals that work. No fancy techniques, no expensive ingredients – just real food that tastes like a warm hug. If I can go from kitchen zero to hero, so can you!

Tomato Basil Soup with Grilled Cheese Croutons
Equipment
- Large pot
- Baking sheet
- Blender or immersion blender
Ingredients
For the Tomato Basil Soup
- 2 tbsp olive oil
- 1 onion, diced
- 2 cloves garlic, minced
- 28 oz canned crushed tomatoes
- 2 cups vegetable broth
- 1/4 cup fresh basil, chopped
- 1/2 tsp salt
- 1/4 tsp black pepper
For the Grilled Cheese Croutons
- 4 slices bread
- 1 cup shredded cheddar cheese
- 2 tbsp butter
Instructions
- Heat olive oil in a large pot over medium heat. Add diced onion and cook until soft, about 5 minutes.
- Add minced garlic and cook for 1 minute until fragrant.
- Pour in crushed tomatoes and vegetable broth. Bring to a simmer and cook for 15 minutes.
- Stir in chopped basil, salt, and black pepper. Blend the soup until smooth using a blender or immersion blender.
- For the grilled cheese croutons, butter one side of each bread slice. Place cheese between two slices, buttered sides out.
- Cook in a skillet over medium heat until golden and crispy, about 3 minutes per side. Cut into small squares.
- Serve the soup hot, topped with grilled cheese croutons.

