Soups & stews / Chowders & creamy soups
Roasted Cauliflower Soup
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Roast the cauliflower until the edges turn deep gold and the whole kitchen smells nutty and warm. Blend it silky, finish with lemon and a pinch of nutmeg, and save a few roasted florets for the top.
The short version
Roast cauliflower at 425°F until browned, soften onion and garlic, then simmer everything in broth for 20 minutes. Blend very smooth, stir in butter and a little cream, and finish with lemon and nutmeg. About an hour.
What makes ours better
why ours wins the argument at dinner
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Roast the cauliflower first. Roasting browns the edges and turns the flavor sweet and nutty. Boiled cauliflower tastes flat and slightly sulfurous in comparison.
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Blend in a stand blender. A countertop blender gets the soup truly silky. Immersion blenders often leave a faint grain in cauliflower.
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Finish with butter, lemon and nutmeg. Butter adds richness, lemon lifts the flavor, and a pinch of nutmeg brings out the cauliflower's sweetness. Add them off the heat, just before serving.
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Save a few roasted florets for the top. They give the bowl some texture and a hint of what's inside.
What you need
the stars of the show
- Cauliflower2 pounds
- Olive oil3 tablespoons
- Yellow onion1 medium
- Garlic3 cloves
- Vegetable or chicken broth4 cups
- Heavy cream½ cup
- Unsalted butter2 tablespoons
- Freshly grated nutmeg⅛ teaspoon
yes, all of the butter
Steps
go slow. the good part can’t be rushed.
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Roast the cauliflower
Heat the oven to 425°F. Toss the florets with 2 tablespoons of the olive oil and ½ teaspoon of the salt on a large rimmed baking sheet and spread them in a single layer. Roast for 25 to 35 minutes, turning once halfway, until tender and deeply browned at the edges.
Use two pans if the florets are crowded. Overlapping pieces steam instead of brown.
About 30 min. Cook mode has a timer for this step.
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Soften the onion
While the cauliflower roasts, warm the remaining 1 tablespoon oil in a large pot over medium heat. Cook the onion with the remaining ½ teaspoon salt for 6 to 8 minutes, until soft and translucent. Add the garlic for 1 minute.
About 7 min. Cook mode has a timer for this step.
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Simmer together
Set aside about 1 cup of the nicest roasted florets for garnish. Add the rest to the pot along with the broth. Bring to a boil, then reduce to a simmer and cook, partly covered, for 15 to 20 minutes, until the cauliflower is very soft.
About 18 min. Cook mode has a timer for this step.
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Blend until silky
Remove the pot from the heat and let it cool for 5 minutes. Working in batches, fill a blender no more than halfway, remove the center cap of the lid, cover the opening with a folded towel, and blend on high for a full minute, until completely smooth. Pour each batch into a clean pot.
Blend longer than feels necessary. A full minute is what takes it from good to silky.
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Enrich and season
Warm the soup over low heat. Stir in the cream and butter until the butter melts. Off the heat, stir in the lemon juice and nutmeg. Taste and add more salt or lemon until it tastes bright. Thin with a splash of broth or water if it's thicker than you like.
Season at the end. Broth and butter vary in saltiness.
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Serve
Ladle into bowls and top with the reserved roasted florets, chives and a drizzle of olive oil.
Good to know
the stuff I’d tell you over the phone
- For a dairy-free soup, skip the cream and butter and finish with 2 tablespoons of olive oil, or blend in ¼ cup soaked raw cashews.
- Roast longer for a nuttier, deeper flavor; the more browned the cauliflower, the more flavor in the soup.
- Good toppings include crisp pancetta, toasted pepitas, brown butter, crumbled blue cheese or a drizzle of chili oil.
- Storage. Refrigerate up to 4 days. Freeze for up to 3 months, leaving out the cream and lemon, then stir them in after reheating.
Questions, answered
asked and answered at the kitchen counter
Why is my cauliflower soup bitter or sulfurous?
The cauliflower was boiled too long or never browned. Roasting it first gives sweetness, and the lemon at the end balances any bitterness.
Can I use frozen cauliflower?
Yes. Roast it straight from the freezer on a hot pan, spread out, adding 5 to 10 minutes. It browns less than fresh but still works.
How do I make cauliflower soup creamier without cream?
Blend longer, add a small peeled potato to the simmer, or finish with olive oil instead of cream. Roasted cauliflower is already naturally creamy.
Why is my soup grainy?
Usually an immersion blender or an under-cooked cauliflower. Simmer until very soft and blend in a countertop blender for a full minute.
Can I make it ahead?
Yes. Make it through the blending step, cool and refrigerate. Reheat, then add the cream, butter, lemon and nutmeg.
From the table
Made it? Tell me everything. Especially if somebody said it was better than their mother’s. I’ll keep your secret.
Made it?
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Published October 29, 2026.