
Thickening cream of mushroom soup is a common culinary challenge, whether you're preparing it from scratch or enhancing a canned version. Achieving the perfect consistency involves balancing flavor and texture, often using techniques like a roux, cornstarch slurry, or flour-based thickener. For a richer result, heavy cream or evaporated milk can add both thickness and depth, while blending in ingredients like pureed mushrooms or potatoes provides natural body without altering the soup's essence. Each method offers unique benefits, allowing cooks to tailor the dish to their preferences while ensuring a velvety, satisfying finish.
| Characteristics | Values |
|---|---|
| Methods to Thicken | Roux, Flour or Cornstarch Slurry, Cream Cheese, Heavy Cream, Pureed Vegetables, Beurre Manié, Arrowroot, Tapioca Starch, Egg Yolks, Simmering/Reduction |
| Roux | Equal parts butter and flour cooked until golden; adds richness and flavor. |
| Flour/Cornstarch Slurry | Mix 1 tbsp flour/cornstarch with 2 tbsp cold water/broth; stir into soup. |
| Cream Cheese | Adds tanginess and thickness; use 2-4 oz softened cream cheese. |
| Heavy Cream | Adds richness; simmer gently to thicken without curdling. |
| Pureed Vegetables | Blend cooked vegetables (e.g., mushrooms, potatoes) into the soup. |
| Beurre Manié | Knead equal parts butter and flour into a paste; whisk into soup. |
| Arrowroot/Tapioca Starch | Gluten-free options; mix with cold liquid before adding to soup. |
| Egg Yolks | Temper yolks with hot soup; adds richness but risks curdling if overheated. |
| Simmering/Reduction | Cook uncovered to evaporate liquid and concentrate flavors. |
| Key Considerations | Avoid boiling after thickening; adjust seasoning after thickening. |
| Best for Richness | Roux, Cream Cheese, Heavy Cream |
| Best for Quick Fix | Flour/Cornstarch Slurry, Beurre Manié |
| Gluten-Free Options | Arrowroot, Tapioca Starch, Pureed Vegetables |
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What You'll Learn
- Roux Method: Cook flour and butter, then whisk into cream for a smooth, thick base
- Cornstarch Slurry: Mix cornstarch with water, stir into cream, and simmer until thickened
- Heavy Cream Reduction: Simmer cream slowly to evaporate liquid, naturally thickening the sauce
- Pureed Vegetables: Blend cooked mushrooms or potatoes into the cream for added body
- Cream Cheese Addition: Stir in softened cream cheese for richness and thickness

Roux Method: Cook flour and butter, then whisk into cream for a smooth, thick base
The roux method is a classic technique used in cooking to thicken sauces, soups, and gravies, making it an excellent choice for thickening cream of mushroom soup. This method involves cooking flour and butter together to create a paste-like mixture that, when whisked into the cream, results in a smooth and velvety texture. To begin, gather your ingredients: equal parts butter and flour (typically 2-3 tablespoons each), and your cream of mushroom soup. The ratio of roux to liquid is crucial; too much roux will make the soup overly thick, while too little won't achieve the desired consistency. Start by melting the butter in a saucepan over medium heat. Once the butter is fully melted and starts to bubble slightly, add the flour, stirring constantly with a whisk to combine.
As you cook the flour and butter mixture, you’ll notice it begins to transform. This stage is essential, as it cooks out the raw flour taste and creates a foundation for thickening. Continuously whisk the roux for about 2-3 minutes, ensuring it doesn’t burn. The roux will turn from a pale blonde to a light golden color, depending on how long you cook it. For cream of mushroom soup, a lighter roux is ideal, as it maintains a neutral flavor that complements the earthy mushroom taste. Avoid overcooking, as a darker roux can add a nutty flavor that might overpower the soup. Once the roux is ready, remove it from the heat momentarily to prepare for the next step.
Now, it’s time to incorporate the roux into the cream of mushroom soup. Gradually whisk a small amount of the hot soup into the roux to temper it, preventing lumps from forming. This step is crucial for achieving a smooth consistency. After the roux is tempered, slowly pour the roux mixture back into the main pot of soup, whisking continuously. As you stir, you’ll notice the soup begin to thicken. Allow the soup to simmer gently for a few minutes, as the heat helps activate the thickening properties of the roux. Keep whisking to ensure there are no lumps and that the roux is fully integrated into the soup.
The final result should be a cream of mushroom soup with a rich, smooth, and thickened base. The roux method not only adds body to the soup but also enhances its overall texture and mouthfeel. Taste the soup and adjust seasoning if needed, as thickening can sometimes mute flavors. If the soup becomes too thick, simply add a splash of milk or broth to adjust the consistency to your liking. This method is versatile and reliable, making it a go-to technique for anyone looking to elevate their cream of mushroom soup.
For best results, practice makes perfect when using the roux method. Pay close attention to the cooking time of the roux and the gradual incorporation into the soup to avoid lumps. With patience and precision, you’ll master this technique, ensuring your cream of mushroom soup is always perfectly thickened. Whether you’re preparing a quick weeknight meal or a special dish for guests, the roux method guarantees a professional finish that’s sure to impress.
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Cornstarch Slurry: Mix cornstarch with water, stir into cream, and simmer until thickened
When using a cornstarch slurry to thicken cream of mushroom soup, the process begins with creating the slurry itself. In a small bowl, mix 1 tablespoon of cornstarch with 2 tablespoons of cold water until the mixture is smooth and free of lumps. This ratio ensures the slurry is thin enough to blend seamlessly into the cream without causing clumps. Cornstarch is ideal for this purpose because it dissolves easily in cold liquid and activates when heated, providing a glossy, smooth texture without altering the flavor of the soup.
Once the cornstarch slurry is prepared, it’s time to incorporate it into the cream of mushroom soup. Gradually stir the slurry into the simmering soup, ensuring it’s well-distributed. Avoid adding the slurry all at once, as this can lead to uneven thickening or lumps. Stir continuously as you pour to help the cornstarch integrate smoothly. The soup should already be warm or simmering, as cornstarch requires heat to activate its thickening properties.
After adding the cornstarch slurry, continue to simmer the soup over medium heat, stirring frequently. The soup will begin to thicken within 2–3 minutes as the cornstarch cooks and swells. Keep a close eye on the consistency, as overcooking can cause the soup to become too thick or gummy. The goal is to achieve a creamy, velvety texture that coats the back of a spoon without being overly heavy.
One key advantage of using a cornstarch slurry is its ability to thicken without adding extra fat or calories, making it a lighter alternative to methods like a roux. Additionally, cornstarch is flavor-neutral, so it won’t interfere with the earthy, savory taste of the cream of mushroom soup. For best results, adjust the amount of slurry based on the desired thickness, starting with a small amount and adding more if needed.
Finally, taste and adjust the seasoning after thickening, as the cornstarch slurry may slightly dilute the flavor. A pinch of salt, pepper, or a dash of fresh herbs can enhance the overall taste. Once thickened to your liking, remove the soup from the heat and serve immediately. The cornstarch slurry method is quick, effective, and ensures your cream of mushroom soup has the perfect consistency every time.
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Heavy Cream Reduction: Simmer cream slowly to evaporate liquid, naturally thickening the sauce
Heavy cream reduction is a classic technique used to thicken sauces, including cream of mushroom, by simmering the cream slowly to evaporate excess liquid. This method not only concentrates the sauce but also enhances its flavor, creating a rich and velvety texture. To begin, pour the desired amount of heavy cream into a saucepan over medium-low heat. It’s crucial to use low heat to prevent scorching, as high temperatures can cause the cream to curdle or burn. Stir the cream occasionally with a heat-resistant spatula or wooden spoon to ensure even heating and to prevent it from sticking to the bottom of the pan.
As the cream simmers, you’ll notice it begins to reduce in volume and thicken gradually. The key to successful heavy cream reduction is patience; rushing the process can lead to uneven thickening or a grainy texture. Keep a close eye on the cream, as the transformation from thin to thick happens relatively quickly once the evaporation process accelerates. The goal is to reduce the cream until it reaches your desired consistency, which could take anywhere from 10 to 20 minutes depending on the amount of cream and your preferred thickness.
During the reduction process, the cream’s natural fats and solids concentrate, creating a luscious, smooth texture ideal for cream of mushroom soup. This method is particularly effective because it doesn’t require additional thickeners like flour or cornstarch, preserving the pure, creamy flavor of the sauce. As the cream reduces, its flavor intensifies, adding depth to the mushroom base. For best results, combine the reduced cream with your sautéed mushrooms and other ingredients toward the end of cooking to maintain the sauce’s richness.
To ensure the cream reduces evenly, avoid covering the saucepan, as this can trap steam and slow down the evaporation process. If you’re incorporating other ingredients like mushrooms or seasonings, add them after the cream has thickened to prevent dilution. Once the cream has reached the desired consistency, remove it from the heat promptly to stop the cooking process. Over-reducing the cream can cause it to become too thick or even separate, so it’s important to monitor it closely in the final stages.
Heavy cream reduction is a simple yet effective way to thicken cream of mushroom soup without altering its flavor profile. This technique is especially useful for those seeking a dairy-based thickening method that complements the earthy, savory notes of mushrooms. By simmering the cream slowly and attentively, you can achieve a perfectly thickened sauce that elevates your dish. Remember, the key to success lies in low heat, constant stirring, and careful observation to ensure the cream reduces evenly and smoothly.
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Pureed Vegetables: Blend cooked mushrooms or potatoes into the cream for added body
One effective and flavorful way to thicken cream of mushroom soup is by incorporating pureed vegetables, specifically cooked mushrooms or potatoes. This method not only adds body to the soup but also enhances its earthy flavor profile. To begin, cook your mushrooms until they are tender and slightly browned. This step is crucial as it concentrates their flavor and releases moisture, which can otherwise dilute the cream. Once cooked, blend the mushrooms into a smooth puree using a blender or immersion blender. Gradually stir the mushroom puree into the cream of mushroom soup, allowing it to thicken naturally while deepening the mushroom essence.
If you prefer a milder taste or want to balance the mushroom flavor, pureed potatoes are an excellent alternative. Boil or steam potatoes until they are fork-tender, then mash or blend them into a smooth consistency. Potatoes act as a natural thickener due to their starch content, providing a creamy texture without altering the soup's primary flavor. Add the potato puree to the soup in small increments, stirring continuously to ensure even distribution. This method is particularly useful if you’re aiming for a heartier, more comforting consistency.
When using either mushrooms or potatoes, it’s important to blend them thoroughly to avoid lumps. A smooth puree ensures a seamless integration into the soup, creating a velvety texture. For best results, allow the soup to simmer gently after adding the puree, as this helps the flavors meld together and the thickening agents to activate fully. This technique is not only practical but also a great way to incorporate extra vegetables into your dish.
Another tip is to season the pureed vegetables before blending them into the soup. Adding a pinch of salt, pepper, or herbs like thyme can elevate the overall taste. This step ensures that the thickened soup remains well-balanced and flavorful. Additionally, if you’re using potatoes, consider reserving some of the cooking liquid (such as potato water) to adjust the consistency of the puree, as it contains starch that can further aid in thickening.
Finally, this method of thickening cream of mushroom soup with pureed vegetables is a healthier alternative to using heavy creams or roux. It adds nutritional value while maintaining a rich, satisfying texture. Whether you choose mushrooms for an intensified umami flavor or potatoes for a subtle, creamy base, this technique is versatile and easy to customize to your preference. Experiment with ratios to achieve your desired thickness and enjoy a bowl of soup that’s both delicious and thoughtfully prepared.
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Cream Cheese Addition: Stir in softened cream cheese for richness and thickness
When aiming to thicken cream of mushroom soup while enhancing its richness, incorporating softened cream cheese is a highly effective method. Start by allowing a few ounces of cream cheese to come to room temperature, ensuring it’s soft enough to blend smoothly. This step is crucial because cold cream cheese can result in lumps, disrupting the soup’s creamy texture. Once softened, cut the cream cheese into small cubes to facilitate quicker and more even incorporation into the soup. This preparation ensures that the cream cheese melts seamlessly, contributing to both thickness and a velvety mouthfeel.
To add the cream cheese, reduce the heat to low to prevent the soup from boiling, which can cause separation or curdling. Gradually stir in the cubed cream cheese, using a whisk or a wooden spoon to ensure it dissolves completely. The cream cheese will begin to melt and blend into the soup, thickening it naturally while adding a tangy, creamy richness. Be patient and stir continuously to avoid any clumps, as thorough integration is key to achieving a smooth and uniform consistency. This process typically takes 3-5 minutes, depending on the amount of cream cheese and the heat level.
The amount of cream cheese to use depends on how thick and rich you want the soup to be. For a subtle thickening effect, start with 2-3 ounces of cream cheese for every 4 cups of soup. If you prefer a more pronounced thickness and creaminess, you can add up to 6 ounces. Keep in mind that cream cheese not only thickens the soup but also adds a tangy flavor that complements the earthy tones of the mushrooms. Adjust the quantity based on your taste preferences and the desired consistency.
After stirring in the cream cheese, allow the soup to simmer gently for a few minutes to ensure the flavors meld together. This step also helps stabilize the thickened texture, creating a cohesive and luxurious soup. Taste the soup and adjust seasoning if needed, as cream cheese can slightly alter the balance of salt and pepper. A pinch of freshly ground black pepper or a sprinkle of chopped parsley can enhance the overall flavor profile after the cream cheese addition.
Finally, serve the cream of mushroom soup immediately to enjoy its optimal thickness and richness. The cream cheese addition not only thickens the soup but also elevates its overall indulgence, making it a comforting and satisfying dish. This method is particularly ideal for those seeking a quick, dairy-based thickening solution that doesn’t require a roux or additional starches. With its simplicity and effectiveness, cream cheese is a go-to ingredient for transforming cream of mushroom soup into a decadent, restaurant-quality meal.
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Frequently asked questions
Common methods include using a roux (equal parts butter and flour cooked together), adding a cornstarch slurry (cornstarch mixed with water), or incorporating heavy cream or evaporated milk to naturally thicken the soup.
Yes, but it’s best to first make a roux by cooking flour with butter or oil to avoid lumps. Gradually whisk the roux into the soup and simmer until thickened.
Use a small amount of cornstarch or arrowroot powder mixed with water to create a slurry, then stir it into the soup. These options add minimal calories while effectively thickening the dish.
























