This rich and comforting soup combines a variety of fresh garden vegetables with a velvety, cheesy base. It is a filling and hearty meal that is perfect for chilly evenings or as a satisfying lunch.

List of ingredients

5 tablespoons unsalted butter (divided) – used for both sautéing and the thickening roux.
1 tablespoon olive oil – prevents the butter from burning during the initial sauté.
3 cups mirepoix (or 1 cup each of diced carrots, celery, and yellow onion) – creates the aromatic foundation.
2 teaspoons minced garlic – adds a punch of savory flavor.
1-1/2 pounds baby potatoes (gold or red, diced into 4 cups) – provides a hearty texture.
1-1/2 teaspoons Italian seasoning – brings a blend of classic herbs to the broth.
3/4 teaspoon salt – enhances the natural flavors of the vegetables.
3/4 teaspoon pepper – adds a touch of mild warmth.
3 cups chicken stock (or vegetable broth for a vegetarian version) – serves as the savory liquid base.
2 cups frozen broccoli florets (thawed and finely chopped) – adds color and nutrient density.
1 cup frozen corn – introduces a slight sweetness and a pop of texture.
6 tablespoons flour – the primary thickening agent for the creamy sauce.
3 cups whole milk – provides the smooth and creamy body of the soup.
1/2 cup heavy cream – ensures a rich and luxurious mouthfeel.
2 cups shredded sharp Cheddar cheese – gives the soup a bold, cheesy flavor profile.
Hearty buttered bread (optional) – an ideal accompaniment for dipping.
Fresh herbs (optional, such as parsley or thyme) – used for a fresh and colorful garnish.

step-by-step instructions

Sauté the Aromatics: Melt 1 tablespoon of butter and the olive oil in a large pot over medium heat. Add the diced carrots, celery, and onion, sautéing for 5 to 7 minutes. Stir in the minced garlic and cook for just 30 seconds to avoid burning.
Simmer the Hearty Vegetables: Add the diced potatoes, Italian seasoning, salt, pepper, and chicken stock to the pot. Bring the mixture to a boil over medium-high heat, then reduce to medium. Cover the pot and cook for 10 to 15 minutes, or until the vegetables are crisp-tender.
Integrate the Frozen Vegetables: Stir in the thawed, finely chopped broccoli and the frozen corn. Continue to cook for 2 to 3 more minutes until these vegetables are tender and heated through.
Prepare the Creamy Roux: In a separate medium saucepan, melt the remaining 4 tablespoons of butter over medium heat. Stir in the flour and whisk constantly for 1 minute. Slowly pour in the milk while whisking continuously until the mixture is smooth. Cook until the sauce has thickened and is gently boiling, then stir in the heavy cream and remove from heat.
Combine and Melt Cheese: Pour the creamy milk mixture into the main soup pot and stir well. Lower the heat and add the shredded Cheddar cheese one handful at a time, stirring until the cheese is completely melted. Taste the soup and adjust the seasonings as needed.
Serve and Garnish: Ladle the warm soup into bowls. Garnish with fresh parsley or thyme and serve alongside toasted and buttered pieces of bread.

Pro Tips for the Best Consistency

Choose Gold or Red Baby Potatoes

Select gold or red baby potatoes because they have a naturally creamy texture and hold their shape well during simmering. Russet potatoes are often too starchy and may break down, which can make the soup feel grainy. Cutting them into small, uniform cubes ensures they cook through evenly in the allotted time.

Maintain Uniform Vegetable Cuts

When preparing your mirepoix, try to dice the carrots, celery, and onions into pieces of similar size. This prevents smaller pieces from overcooking while larger pieces remain raw. Consistent sizing ensures that the aromatic base develops a balanced flavor throughout the cooking process.

Master the Roux Technique

When combining the butter and flour for the sauce, maintain a constant whisking motion over medium heat. This process cooks out the raw flour taste while preventing lumps from forming in the base. Ensure the roux is completely smooth before slowly streaming in the milk to create a velvety texture.

Control the Temperature During Dairy Addition

Keep the heat low when stirring in the cream and cheese to prevent the dairy from curdling. High temperatures can cause the fats to separate, resulting in an oily appearance. Adding the cheese in small handfuls allows it to emulsify properly into the broth.

Ingredient Substitutions

Vegetable Broth for Vegetarian Option

Replace the chicken stock with a high-quality vegetable broth to make this recipe suitable for vegetarians. Ensure the broth is low-sodium if you prefer to control the salt levels yourself. This substitution maintains the depth of flavor without changing the overall character of the dish.

Alternative Dairy Milks

While whole milk provides the best richness, you can use 2% milk if necessary. If using a lower-fat milk, you may need to slightly increase the flour by a tablespoon to maintain the desired thickness. Avoid using thin nut milks as they may not provide the same body as cow’s milk.

Different Cheese Varieties

Sharp Cheddar is recommended for its bold taste, but Monterey Jack or Gruyere are excellent alternatives. Monterey Jack will provide a milder flavor and an even smoother melt. Gruyere adds a sophisticated, nutty undertone that pairs well with the broccoli and potatoes.

Substituting Frozen Corn

If you do not have frozen corn, you can use frozen peas or finely diced zucchini. Frozen peas offer a similar pop of color and sweetness to the dish. Diced zucchini adds a softer texture and a mild flavor that blends well with the other vegetables.

Creative Variations

Adding Hearty Grains

Stir in cooked quinoa, wild rice, or pearl barley to turn this soup into an even more filling meal. Add the grains at the same time as the broccoli and corn to ensure they are heated through. Grains add a pleasant chewiness that contrasts with the creamy broth.

Incorporating Leafy Greens

Fold in a few handfuls of fresh baby spinach or chopped kale during the final two minutes of cooking. The residual heat will wilt the greens without overcooking them. This is a great way to add more vitamins and a vibrant green color to the soup.

Adding a Spicy Kick

For those who enjoy a bit of heat, add a pinch of cayenne pepper or red pepper flakes during the sauté step. You can also stir in a teaspoon of smoked paprika for a deeper, woodsy flavor. These additions contrast beautifully with the richness of the cheese and cream.

Protein Boosts

Add shredded cooked chicken or canned chickpeas to increase the protein content of the soup. If using chickpeas, rinse them well before stirring them in with the other vegetables. This makes the soup a complete one-pot meal that is highly satisfying.

Serving and Pairing Suggestions

The Ideal Crusty Bread

Serve this soup with a toasted sourdough slice or a warm, crusty baguette. The acidity of sourdough cuts through the richness of the cheese sauce perfectly. Buttering the bread and toasting it until golden brown provides a satisfying crunch.

Fresh Side Salads

Pair the soup with a light garden salad topped with a lemon-vinaigrette. The brightness of the citrus and the crispness of raw greens balance the heavy nature of the creamy base. A simple mix of arugula, cucumber, and radish works exceptionally well.

Creative Bread Bowl Presentation

For a more impressive presentation, serve the soup inside a hollowed-out round loaf of sourdough bread. Carefully carve out the center of the loaf, leaving a thick wall and bottom. This allows guests to eat the bread as they finish the soup.

Fresh Herb Garnishes

Use fresh parsley, thyme, or chives to garnish each bowl just before serving. These herbs add a burst of freshness and visual appeal to the dish. A sprinkle of extra sharp Cheddar on top can also enhance the cheesy flavor.

Storage and Preservation

Proper Cooling Process

Allow the soup to cool to room temperature before transferring it into storage containers. Placing hot soup directly into the refrigerator can raise the internal temperature of the fridge and affect other foods. Using a shallow container helps the soup cool more rapidly and evenly.

Refrigeration Guidelines

Store the soup in airtight containers in the refrigerator for up to four days. Ensure the lid is sealed tightly to prevent the soup from absorbing other odors from the fridge. Stir the soup well before reheating as some separation may occur during storage.

Freezer Safety Tips

When freezing the soup, leave about an inch of headspace at the top of the container. Liquid expands as it freezes, and leaving space prevents the container from cracking or the lid from popping off. Use freezer-safe plastic or glass containers for the best results.

Freezer Lifespan

This soup can be stored in the freezer for up to three months while maintaining its quality. Beyond this period, the flavor may begin to dull and the texture may change. Label your containers with the date to keep track of the storage time.

Reheating Guidance

Stovetop Reheating Method

Warm the soup in a pot over low to medium-low heat, stirring frequently. This prevents the bottom from scorching and ensures the cheese is redistributed evenly. Avoid boiling the soup during reheating to prevent the dairy from separating.

Microwave Reheating Tips

Heat the soup in short intervals of 60 to 90 seconds, stirring thoroughly between each burst. This ensures that the heat is distributed evenly and prevents hot spots. Cover the bowl with a microwave-safe lid to keep the moisture in.

Correcting the Texture

Because the flour and potatoes continue to thicken the soup as it sits, it may be too thick after reheating. Stir in a splash of milk or vegetable broth to return the soup to its original creamy consistency. Do this gradually until the desired thickness is achieved.

Troubleshooting Common Issues

Fixing a Lumpy Sauce

If you notice lumps of flour in your sauce, use a whisk to vigorously blend them out over medium heat. If the lumps persist, you can use an immersion blender for a few seconds to smooth the mixture. Always add the milk slowly to the roux to prevent this from happening.

Preventing Cheese Separation

If the cheese appears to be separating into oil, it is usually because the heat is too high. Immediately lower the temperature and stir rapidly to re-emulsify the sauce. Adding the cheese gradually and stirring constantly is the best way to avoid this issue.

Avoiding Mushy Potatoes

To prevent the potatoes from becoming too soft, monitor them closely during the simmering stage. Remove the pot from the heat as soon as they are crisp-tender. Overcooking the potatoes can lead to a grainy texture in the final soup.

Frequently Asked Questions

Can I use frozen mirepoix?

Yes, you can use pre-chopped frozen mirepoix to save time. Add it directly to the pot with the butter and oil and sauté until the moisture has evaporated and the vegetables are tender.

Can I use a food processor for chopping?

You can use a food processor to dice the vegetables, but use the pulse setting carefully. Over-processing the vegetables will turn them into a puree, which will change the texture of the soup.

Is this soup gluten-free?

As written, this soup is not gluten-free because it uses all-purpose flour. To make it gluten-free, replace the flour with an equal amount of cornstarch mixed with water or a gluten-free flour blend.

Can I make this in a slow cooker?

The vegetable base can be cooked in a slow cooker on low for 6-8 hours. However, the creamy roux must be prepared separately on the stove and stirred in at the very end to ensure the correct texture.