3-Ingredient Roasted Carrot Soup (Vegan, Oil-Free)

Silky roasted carrot soup gets its luxurious body from a can of white beans, not cream. Made with only three main ingredients, it is vegan, gluten-free, grain-free, and oil-free, with 7 grams of protein and more than10 grams of fiber per generous serving. Roasting concentrates the carrots and onion into a sweet-savory soup that tastes far more elaborate than its short ingredient list suggests.

A bag of carrots, a large onion, and a can of white beans may not look like the makings of a spectacular soup. I am using “spectacular” deliberately. Once the vegetables are roasted until soft and deeply browned at the edges, then blended with the beans, they become a vivid orange soup with the smoothness of cream and the concentrated flavor of far more complicated cooking.

I developed this recipe because I wanted more minimalist ways to make eating an abundance of vegetables feel delectable and satisfying. This soup does not merely qualify; it over-qualifies. The ingredient list is short, the method is plain, and the results feel generous rather than austere.

White beans are the stealth ingredient. You will not taste beans in the finished soup, but you will notice what they contribute: a velvety body, savory balance, 6 grams of plant protein, and more than 8 grams of fiber per serving. The carrots supply sweetness, the onion adds depth, and roasting does the heavy flavor work. Salt, pepper, and a blender take care of the rest.

Why You’ll Love This Recipe

• Only three main ingredients:Carrots, onion, and a can of white beans are the entire foundation of the soup.
• Luxuriously creamy without cream:Blended white beans create a silky, substantial texture without dairy, coconut milk, cashews, or flour.
• Deep roasted flavor:Browning the carrots and onion concentrates their flavor and adds savory, caramelized notes.
• High in fiber:One generous 1-and-1/4-cup serving provides 10 grams of fiber.
• A good source of plant protein:Each serving has 7 grams of protein, courtesy of the quietly hardworking beans.
• Friendly to many diets:The soup is naturally vegan, gluten-free, grain-free, nut-free, and oil-free (e.g., no butter, or extra-virgin olive oil) when the pan is prepared with parchment.
• Frugal and practical:It transforms inexpensive, straightforward-to-find ingredients into a full pot of soup.
• Excellent for meal preparation:The soup refrigerates and freezes well, and its flavor is even better after a night in the refrigerator.

Ingredients

The exact amounts of each ingredient are indicated in the recipe card at the end of the post.Toggle betweenUS Customary(volume) andMetric(weights) for preferred measurement option.

• Carrots:Two pounds of carrots give the soup its vibrant color, natural sweetness, and earthy flavor. Peel or thoroughly scrub them, then cut them into similar-size rounds so they roast evenly.
• Large onion:Roasting mellows the onion and develops the browned, savory flavor that keeps the carrots from tasting one-dimensionally sweet. A yellow or sweet onion is ideal.
• Canned white beans:Cannellini, Great Northern, or navy beans all work. Once rinsed, drained, and blended, the beans disappear into the soup while adding creaminess, protein, fiber, and savory balance.
  • Water:Begin with 2 cups for blending, then whisk in another 1 and 1/2 cups as the soup heats. Add more at the end if you prefer a thinner consistency.
  • Salt and black pepper:These plain seasonings sharpen and balance the flavor of the roasted vegetables. The amount needed will depend partly on whether the beans contain salt.
  • For the baking sheet:Line the pan with parchment paper for oil-free preparation. Alternatively, use nonstick spray or a light coating of oil if that suits your needs.

How to Make 3-Ingredient Roasted Carrot Soup

Note that the complete instructions are also in the recipe card below.

1. Prepare the oven and baking sheet.Preheat the oven to 400°F (200°C). Line a large rimmed baking sheet with parchment paper for oil-free preparation, or coat it with nonstick spray.
2. Roast the carrots and onion.Spread the carrot rounds and onion chunks across the prepared pan in a single layer. Season with salt and black pepper. Roast for 30 to 35 minutes, turning the vegetables once if desired, until they are very tender and browned at the edges. Do not stop when the vegetables are merely soft. The browned (caramelized) edges are where much of the soup’s flavor develops.
3. Prepare the beans.While the vegetables roast, rinse and drain the white beans thoroughly. Rinsing removes the thick canning liquid and any excess sodium or canned flavor.
4. Blend until silky.If you are using a conventional blender, let the vegetables cool for at least 15 minutes before blending. A high-speed blender designed to process hot ingredients can be used immediately according to the manufacturer’s directions. Place the roasted carrots and onion, white beans, and 2 cups of water in the blender. Blend on high until completely smooth and velvety. The mixture will be thick and brilliantly orange.
5. Warm and thin the soup. Scrape the purée into a large saucepan. Whisk in an additional 1 and 1/2 cups of water and cook over medium heat for 3 to 5 minutes, stirring often, until heated through.
6. Adjust the seasoning and consistency.Taste the soup and add more salt and pepper as needed. Whisk in additional water, a little at a time, until the soup reaches your preferred consistency. Serve hot, with toppings or additional seasonings if desired.

Taste and Texture of the Soup

Roasted carrot soup has a gentle natural sweetness balanced by the savory depth of browned onion and white beans. Roasting concentrates the flavor of the vegetables, so the finished soup tastes rich and developed even though the ingredient list is remarkably brief.

The texture is exceptionally smooth, thick, and velvety. White beans take the place of cream without making the soup taste beany or heavy. A high-speed blender produces the silkiest finish, but a conventional blender or immersion blender also works. The soup thickens as it stands, becoming almost spoon-coating after refrigeration; a splash of water restores the original consistency.

Storage

Cool the roasted carrot soup promptly and transfer it to shallow, airtight containers. Refrigerate or freeze it within 2 hours of cooking.

• Refrigerator:Store for 3 to 4 days. Reheat gently in a saucepan or microwave, stirring in a splash of water if the soup has thickened.
• Freezer:Freeze for up to 3 to 4 months. Leave a little expansion space in the container. Thaw overnight in the refrigerator before reheating, or reheat gently from frozen.
• Reheating:Warm over medium-low heat, stirring frequently. Add water or broth as needed to loosen the consistency. Avoid a hard boil, which can cause thick puréed soup to spit and scorch.

Flavor Variations

My unseasoned version is intentionally plain and full-flavored, but it also makes an excellent canvas for additions.

• Carrot-ginger:Blend in 1 to 2 teaspoons finely grated fresh ginger, or add 1/2 teaspoon ground ginger when warming the soup.
• Curried carrot:Stir in 1 to 2 teaspoons curry powder, according to its strength, while the soup heats. Finish with a squeeze of lime juice.
• Cumin and smoked paprika:Add 1 teaspoon ground cumin and 1/2 teaspoon smoked paprika for a warm, earthy variation.
• Herbed:Add 1 teaspoon dried thyme, rosemary, or herbes de Provence before blending. Use rosemary sparingly so it does not overwhelm the carrots.
• Bright and lemony:Stir in 1 to 2 tablespoons fresh lemon juice just before serving. The acidity sharpens the roasted flavors and tempers the carrots’ sweetness.
• Spicy:Add cayenne pepper, red pepper flakes, sriracha, or another go-to hot sauce to taste.
• Extra-rich:Replace some of the final 1 and 1/2 cups of water with unsweetened coconut milk or nondairy milk. The soup will no longer be a strict three-ingredient recipe, but it will be especially rich.
• Carrot-parsnip:Replace up to half of the carrots with peeled parsnips for a paler, earthier soup with gentle peppery notes.

Tips for Success

• Cut the vegetables evenly.Similar-size pieces finish roasting at the same time. Aim for carrot rounds about 1/2 inch thick and large, evenly sized onion chunks.
• Use a large pan.Crowded vegetables steam rather than roast. Give the carrots and onions enough room for their edges to brown.
• Roast until deeply tender.A knife should slide easily into the carrots, and both vegetables should show browned edges. Pale, barely tender vegetables will make a flatter-tasting soup.
• Rinse the beans well.This keeps the flavor clean and allows the roasted carrots and onion to remain prominent.
• Blend in stages if necessary.Do not overfill a blender, particularly when processing warm ingredients. Remove the center cap from the lid if instructed by the manufacturer and cover the opening loosely with a folded kitchen towel so steam can escape.
• Add the water in two stages.Using only 2 cups at first helps the blender create the smoothest purée. Add the remaining water in the saucepan, where you can control the final thickness.
• Season after blending.Canned beans vary in sodium. Taste the finished soup before deciding how much additional salt it needs.
• Expect thickening.The soup becomes thicker as it cools and rests. Add water when reheating rather than over-thinning it initially.
• Use a high-speed blender for maximum silkiness.An immersion blender works, but the finished soup may retain a little more texture.

Ingredient Substitutions

• Carrots:Replace up to half of the carrots with parsnips, sweet potato, or winter squash. Each option changes the flavor and color, but the basic roasting and blending method remains the same.
• Onion:Yellow, white, or sweet onions work equally well. You can also use about 8 ounces of shallots for a milder, slightly more refined onion flavor.
• White beans:Use cannellini, Great Northern, navy, or small white beans. Chickpeas can be used in a pinch, but they have a more noticeable flavor and will not produce quite as silky a texture.
• Canned beans:Replace the 15-ounce can with approximately 1 and 1/2 cups of home-cooked white beans, rinsed and drained.
• Water:Use low-sodium vegetable broth for a more savory soup. Taste before adding salt because commercial broth can contribute a considerable amount.
• Nonstick spray:Line the baking sheet with parchment paper or a silicone baking mat for oil-free preparation.

Frequently Asked Questions

Yes. Carrots, onion, and white beans are the three main ingredients. Water, salt, and pepper are treated as pantry basics and are not included in the count.

No. The flavor of the beans disappears behind the roasted carrots and onion. Their primary contributions are creaminess, savory balance, protein, and fiber.

White beans create a creamy texture without dairy, coconut milk, cashews, flour, or added oil. They also make the soup more substantial and provide 6 grams of protein and more than 8 grams of fiber per serving.

No. Peeling gives the soup the cleanest color and flavor, but thoroughly scrubbed carrots can be used without peeling. Trim away any damaged or discolored areas before slicing.

Yes. Measure 2 pounds and cut especially thick baby carrots lengthwise so that all the pieces roast at roughly the same rate.

Roasting is essential to the character of this recipe. You can make a soup from steamed or simmered carrots and onion, but it will lack the concentrated sweetness, browned edges, and savory depth of the roasted version.

Yes. Combine the roasted vegetables, beans, and water in a deep saucepan, then blend until as smooth as possible. An immersion blender generally leaves more texture than a countertop blender, but the soup will still be satisfying.

Whisk in additional water or low-sodium vegetable broth, 1/4 cup at a time, until the consistency suits you. Remember that the soup thickens after cooling.

Yes. The soup keeps well in the refrigerator for 3 to 4 days and can be frozen for 3 to 4 months. Portion it into individual containers for quick lunches.

The soup itself contains no oil. To keep the entire preparation oil-free, roast the vegetables on parchment paper or a silicone baking mat instead of coating the pan with cooking spray.

Yes, when made with water. If you use vegetable broth or add nondairy milk, check the labels for gluten, nuts, and cross-contact according to your dietary needs.

Try chopped parsley, cilantro, toasted pumpkin seeds, crispy chickpeas, red pepper flakes, vegan yogurt, a squeeze of lemon, or a swirl of hot sauce. For a plain meal, pair the soup with toast, crackers, or a hearty salad.

More Straightforward Soups to Try

• 3-Ingredient Lentil Soup (vegan, high-protein)
• Vegan Chickpea Flour Matzo Ball Soup
• 3-Ingredient Carrot & Red Lentil Soup {vegan, oil-free}
• Vegan Broccoli Cheese Soup
• 3-Ingredient Black Bean Pumpkin Soup {vegan, oil-free}
• Vegan Spinach Artichoke Soup {straightforward, high protein}
• 3-Ingredient Enchilada Soup {Vegan, High-Protein}
• Kale Potato & White Bean Soup {Vegan, High-Protein}