📊 Full nutrition facts — per 100g
| Nutrient | Amount | % Daily value | Level |
|---|---|---|---|
| Calories | 25 kcal | 1% | |
| Carbohydrates | 5.0g | 2% | |
| Dietary fibre | 2.0g | 7% | |
| Sugars | 1.9g | — | |
| GI (Glycaemic Index) | ~15 — Near zero | — | |
| Protein | 1.9g | 4% | |
| Vitamin C | 48.2mg | 54% | |
| Folate | 57µg | 14% | |
| Vitamin K | 15.5µg | 13% | |
| Choline | 44.3mg | 8% | |
| Sulforaphane | present | — | |
| Potassium | 299mg | 6% |
Based on Australian NRV. Source: FSANZ Australian Food Composition Database.
📈 Glycaemic index (GI)
💊 Key vitamins & minerals
✅ Health benefits
Cauliflower belongs to the Brassica family and contains the same glucosinolate compounds as broccoli — sulforaphane and indole-3-carbinol (I3C). These compounds activate the Nrf2 pathway (the master regulator of cellular antioxidant defence), inhibit cancer cell proliferation, promote cancer cell apoptosis and reduce oestrogen-driven cancer risk (breast, prostate). Population studies consistently show that higher Brassica consumption is associated with reduced cancer risk, with cauliflower among the most studied varieties.
Cauliflower is one of the few vegetables providing meaningful choline — a nutrient essential for cell membrane integrity, neurotransmitter acetylcholine synthesis, and liver function. Choline deficiency is associated with non-alcoholic fatty liver disease, cognitive decline and neural tube defects. Most Australians consume inadequate choline because it is mainly found in eggs and meat. Cauliflower is one of the best plant-based choline sources available.
At just 25 kcal per 100g, cauliflower provides 54% of daily vitamin C — making it one of the most calorie-efficient vitamin C sources in the vegetable kingdom, exceeded only by capsicum and kiwi among common vegetables. A 100g serving of raw cauliflower provides more vitamin C than an orange (47mg/100g). Cooking reduces vitamin C significantly — steam or roast briefly rather than boiling to retain the most.
Cauliflower's neutral flavour, dense crumbly texture and low carbohydrate content (5g/100g vs 28g for cooked rice) make it the most versatile grain substitute in low-carbohydrate cooking. Processed in a food processor it becomes 'cauliflower rice' (3g carbs per serving vs 45g for white rice). Roasted it forms pizza bases, mashed it replaces potato, and pressed and baked it forms flatbreads. No other vegetable matches its culinary versatility for grain substitution.
⚠️ Who should limit or avoid
Cauliflower contains FODMAPs (fructans and sorbitol) and raffinose — indigestible sugars that are fermented by gut bacteria, producing gas. People with IBS, SIBO or sensitive digestion may experience significant bloating, cramping and flatulence. Cooking reduces FODMAP content substantially — raw cauliflower causes more digestive discomfort than cooked. Start with small cooked portions if you have a sensitive digestive system.
Cauliflower, like all Brassicas, contains goitrogens that can interfere with thyroid hormone synthesis by blocking iodine uptake. At typical dietary amounts (1–2 servings per day), this is not a concern for most people with normal thyroid function. People with hypothyroidism or iodine deficiency may want to limit very large daily quantities and prefer cooked cauliflower (cooking significantly reduces goitrogen content).
Cauliflower provides 13% of daily vitamin K per 100g. People on warfarin should maintain consistent cauliflower intake rather than avoiding it — and inform their anticoagulation team about their regular vegetable consumption.
🛒 How to select & buy cauliflower
The curd (the white head) should be tightly packed with small, even florets that feel firm and solid. Any browning, yellowing or black spots indicate oxidation and age — the flavour will be stronger and the vitamin C significantly reduced. The curd should be uniformly white to creamy-white. Some cultivars are naturally cream or ivory coloured and are not inferior to pure white varieties.
The outer leaves should be bright green and fresh, not yellowed or wilted. They have been protecting the curd from light (which would cause yellowing). A head with fresh leaves will have a better quality curd. If leaves have been removed before purchase, check the cut stems — they should be moist and freshly cut, not dried out or brown.
Orange cauliflower contains 25× more beta-carotene than white. Purple cauliflower contains anthocyanins — the same antioxidants as blueberries. Romanesco (green, fractal-shaped) has the nuttiest flavour and high chlorophyll. These coloured varieties are available at farmers' markets, Harris Farm and specialty greengrocers — they are as easy to cook as white cauliflower but nutritionally superior.
🧊 Storage tips & shelf life
Cauliflower deteriorates rapidly at room temperature — exposure to light causes yellowing and flavour changes as chlorophyll develops. Only keep on the bench if refrigerator space is unavailable and use within 2 days. In warm Australian conditions, refrigerate immediately.
Best storage method: store whole head stem-side down in a loose plastic bag in the crisper — this prevents moisture collecting on the curd which accelerates browning. Cut florets store 3–4 days in an airtight container. A folded paper towel in the container absorbs excess moisture. Do not wash until ready to use.
Blanching before freezing is essential — unblanched cauliflower develops poor texture and off-flavours when frozen. Cut into florets, blanch in boiling water 2–3 minutes, drain, cool in ice water, dry thoroughly, freeze flat on a tray then transfer to bags. Use from frozen in soups, curries and roasted dishes.
📖 About cauliflower — complete guide
Cauliflower has a 2,000-year cultivated history — it is believed to have originated in the Cyprus region of the eastern Mediterranean and was described by Pliny the Elder in 70 CE as a prized vegetable in Rome. The name derives from the Latin caulis (stalk) and flos (flower) — it is, technically, a flower that has been harvested before opening, where the white curd represents tightly packed, immature flower buds. Mark Twain memorably described it as 'nothing but cabbage with a college education.' The modern cauliflower's characteristic white colour is produced by blanching — the practice of tying the outer leaves over the developing curd to block sunlight and prevent chlorophyll development, a technique developed in European horticulture in the 16th century.
The 'cauliflower rice' phenomenon — which emerged from the paleo and low-carbohydrate diet movements around 2012–2015 and became a global food trend — transformed cauliflower from a supporting vegetable into a centre-of-plate ingredient. The food processor technique of producing rice-like cauliflower granules was adopted by commercial food companies, restaurants and home cooks globally, and cauliflower became one of the most searched food ingredients of the mid-2010s. Nutritionally, this trend has genuine merit: substituting cauliflower rice for white rice reduces carbohydrate intake by 85–90% per serving while maintaining volume and satiety. The trend also drove broader culinary innovation — cauliflower pizza bases, cauliflower steaks, cauliflower 'buffalo wings' and cauliflower mash have each become established dishes in contemporary Australian restaurant menus.