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Romanesco is the lime-green brassica with pointed, spiraling florets that look almost computer drawn. Shops often label it romanesco broccoli, but research papers classify it with cauliflower. USDA has no entry for romanesco in its SR Legacy food database, so this guide uses clearly labeled cauliflower and broccoli entries as the nearest comparison. It covers what romanesco is, what is and is not known about romanesco nutrition, how romanesco vs cauliflower compares in the kitchen, and what a 2021 study found about how those spirals form.
Peptide Labs does not sell romanesco or romanesco products. This article is general nutrition information, not medical advice.
Key Takeaways
- Plant scientists classify romanesco as a cauliflower, Brassica oleracea var. botrytis, Romanesco group, despite the common name romanesco broccoli.
- USDA SR Legacy has no entry for romanesco; the nearest entries are green cauliflower, white cauliflower and broccoli, which are different vegetables.
- In those nearest USDA entries, 100 grams of raw green cauliflower has 98% of the Daily Value for vitamin C.
- A 2021 Science study traced the nested spirals of cauliflower curds to flower-forming programs that start and stall, and modeled cone shapes reminiscent of romanesco.
- Like other cruciferous vegetables, romanesco contains vitamin K; people taking warfarin are advised to keep vitamin K intake consistent.
What is romanesco?
A 2003 analysis in Food Chemistry describes romanesco as Brassica oleracea var. botrytis, Romanesco group, the same botanical variety as white cauliflower. A 2006 report in Plant Disease calls it romanesco (green) cauliflower and describes commercial, organically grown crops in California. So while menus and produce labels say romanesco broccoli, the science places it with cauliflower. Both, along with broccoli and cabbage, belong to the species Brassica oleracea.
In the kitchen, romanesco sits between its relatives: it has the firm, dense florets of cauliflower and a slightly nuttier, more vegetal taste that reminds many cooks of broccoli. Our sibling guide covers another eye-catching member of the species, red cabbage.
Romanesco nutrition: the USDA data gap
USDA FoodData Central (SR Legacy) has no entry for romanesco. Rather than invent numbers, the table shows the nearest USDA entries, which are different vegetables: green cauliflower, white cauliflower and broccoli, all raw. USDA does not say which green cauliflower types its entry covers, so read it as a neighbor, not a match. Values are per 100 grams with FDA percent Daily Values.
| Per 100 g, raw (USDA FDC ID) | Cauliflower, green (169389) | Cauliflower, white (169986) | Broccoli (170379) |
|---|---|---|---|
| Calories | 31 | 25 | 34 |
| Carbohydrate (% DV) | 6.1 g (2%) | 5.0 g (2%) | 6.6 g (2%) |
| Fiber (% DV) | 3.2 g (11%) | 2.0 g (7%) | 2.6 g (9%) |
| Total sugars | 3.0 g | 1.9 g | 1.7 g |
| Protein (% DV) | 3.0 g (6%) | 1.9 g (4%) | 2.8 g (6%) |
| Vitamin C (% DV) | 88.1 mg (98%) | 48.2 mg (54%) | 89.2 mg (99%) |
| Vitamin K (% DV) | 20.2 mcg (17%) | 15.5 mcg (13%) | 101.6 mcg (85%) |
| Folate (% DV) | 57 mcg DFE (14%) | 57 mcg DFE (14%) | 63 mcg DFE (16%) |
| Potassium (% DV) | 300 mg (6%) | 299 mg (6%) | 316 mg (7%) |
| Manganese (% DV) | 0.25 mg (11%) | 0.16 mg (7%) | 0.21 mg (9%) |
In these USDA entries, green cauliflower and broccoli both carry close to the full Daily Value for vitamin C per 100 grams, white cauliflower about half, and broccoli far more vitamin K than either cauliflower. A cup of raw green cauliflower, 64 grams in USDA data, has about 20 calories and 63% of the Daily Value for vitamin C. None of this gives exact romanesco values, which would need their own analysis. Be wary of websites that list a precise romanesco nutrition panel without naming a source.
Is romanesco healthy?
Based on its closest USDA relatives, romanesco is likely a low-calorie vegetable with fiber, vitamin C and some vitamin K, but the exact amounts are not in SR Legacy. That is a nutrient description, not a health promise. What matters more is that it is a vegetable people enjoy eating; for nutrient-by-nutrient comparisons, see our guides to vitamin C in foods and vitamin K in foods.
Romanesco vs cauliflower
| Feature | Romanesco | White cauliflower |
|---|---|---|
| Botanical group | Brassica oleracea var. botrytis, Romanesco group (Food Chemistry, 2003) | Brassica oleracea var. botrytis (as classified in Plants, 2025) |
| Look | Lime green, pointed spiraling cones | White, rounded curd |
| Texture | Firm, holds its shape when cooked briefly | Firm raw, softens quickly |
| Flavor | Mild, slightly nutty | Mild, slightly sweet |
| USDA SR Legacy entry | None | Cauliflower, raw (FDC 169986) |
In most recipes the two swap easily, and romanesco can stand in wherever cauliflower or broccoli florets appear. Its shape is the main reason to choose it, so gentle cooking that keeps the cones intact makes the most of it.
The science of romanesco spirals
Romanesco is famous as a natural fractal: each cone is made of smaller cones, which are made of still smaller ones. A 2021 study in the journal Science asked how cauliflower curds get spirals nested over a wide range of scales. Working with a cauliflower-like mutant of Arabidopsis, a small lab plant, and with computer modeling, the researchers found that the self-similar pattern arises because growing tips start toward making flowers, fail to finish, and keep a memory of that passing floral state, so they branch again and again. Additional changes to how the growing tips expand produced cone shapes the authors described as reminiscent of the romanesco form.
The study explains shape, not nutrition, and it was done in a model plant rather than in romanesco itself. It is still a neat answer to a question many cooks ask while breaking a head into florets.
Aroma, gas and other cautions
- The sulfur smell: the 2003 Food Chemistry analysis found sulfur compounds, dimethyl disulfide and dimethyl trisulfide, among the main aroma compounds released from cut romanesco florets, part of the familiar brassica smell in the kitchen.
- Gas: NIDDK lists cruciferous vegetables, including cauliflower and broccoli, among foods that may lead to extra gas; our gas and bloating guide covers other causes.
- Blood thinners: the NIH Office of Dietary Supplements advises people taking warfarin to keep vitamin K intake consistent, and MedlinePlus says to talk to your doctor before changing your diet. Romanesco has no USDA vitamin K value, so the same advice as for its cruciferous relatives applies.
- Iodine and goitrogens: the Office of Dietary Supplements lists cruciferous vegetables such as cabbage, broccoli and cauliflower among foods high in goitrogens and says reasonable amounts are not a concern for most people in the United States who get enough iodine and eat a variety of foods. Ask your clinician if you have a thyroid condition.
- Allergies: romanesco is not among the nine major food allergens under US law, but any food can cause a reaction in some people.
How to choose and cook romanesco
- Choosing: pick heavy heads with tight, bright green cones and no brown or soft spots.
- Storing: keep it unwashed in the refrigerator crisper and cook it within a few days.
- Prepping: cut out the core from below and pull the head apart into individual cones.
- Steaming or microwaving: short steaming keeps the shape and color; the NIH Office of Dietary Supplements notes that steaming or microwaving may lessen vitamin C losses compared with longer cooking.
- Roasting: toss florets with oil and roast until the tips brown, as with cauliflower.
- Raw: small florets add crunch to salads and vegetable platters, alongside other brassicas such as kohlrabi and brussels sprouts.
- Lower-carb swaps: romanesco works in the same dishes as other non-starchy vegetables covered in our low-carb foods guide.
Frequently Asked Questions
Is romanesco broccoli or cauliflower?
Research papers classify romanesco as a cauliflower, Brassica oleracea var. botrytis, Romanesco group, even though it is often sold as romanesco broccoli. All of them belong to the same species.
Is romanesco healthy?
USDA has no romanesco entry, but its nearest relatives in USDA data, green cauliflower and broccoli, are low in calories with fiber and close to the full Daily Value for vitamin C per 100 grams.
What does romanesco taste like?
Mild and slightly nutty, a little like a cross between cauliflower and broccoli, with a firm texture that holds its shape when cooked briefly.
Why does romanesco grow in spirals?
A 2021 Science study found that cauliflower-type curds form nested spirals when growing tips start toward making flowers but never finish, and modeled cones reminiscent of romanesco.
Can I eat romanesco raw?
Yes, small florets can be eaten raw in salads or with dips, like cauliflower. Cruciferous vegetables may cause extra gas for some people, according to NIDDK.
Where does romanesco grow?
It is grown commercially in places including California, according to a 2006 Plant Disease report.
Questions about a label? Contact us or read our Buyer’s Guide. Food comes first; follow the label and ask a healthcare provider before starting a supplement, especially if you take medicines, are pregnant or have a food allergy. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Last reviewed October 2026.
Related guides: Red Cabbage: USDA Data, Raw vs Cooked and the pH Color Trick, Cauliflower: Nutrition, Cauliflower Rice and Health Facts, Broccoli: Nutrition, Benefits and Raw vs Cooked Facts.