What Are Those Brown Spots on My Cauliflower? (2024)

Kelli Foster

Kelli FosterSenior Contributing Food Editor

Kelli is a Senior Contributing Food Editor for Kitchn. She's a graduate of the French Culinary Institute and author of the cookbooks, Plant-Based Buddha Bowls, The Probiotic Kitchen, Buddha Bowls, and Everyday Freekeh Meals. She lives in New Jersey.

updated Aug 16, 2022

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What Are Those Brown Spots on My Cauliflower? (1)

If you purchase cauliflower with any degree of regularity, you’ve probably noticed pale brown spots scattered over the white florets. These freckles are the most common defect on cauliflower. Sometimes they’re already present when you buy a whole head or bag of florets. Other times you might not notice them until it’s time to make that creamy cauliflower soup or oven-roasted cauliflower you’ve been eyeing.

So, what exactly is going on here? Cauliflower can develop brown spots due to oxidation, a chemical reaction from prolonged exposure to light and air. But don’t fret, you can still make easy cauliflower recipes and your dinner isn’t necessarily ruined. Find out how to remove these spots and whether your cauliflower is still edible.

What is Oxidation — and Why Does It Cause Those Brown Spots?

A scattering of pale brown spots on the cauliflower curds isn’t all that abnormal, and it doesn’t necessary mean it’s time to ditch that newly purchased veggie. The culprit for this discoloration is oxidation, which happens naturally the longer cauliflower is stored.

Oxidation is simply the natural change in the vegetable’s color due to prolonged exposure to light and air. It’s the same change that occurs when the flesh of sliced apples turns brown, and when ground meat turns gray.

The good news is that you can still cook with this cauliflower. While the discoloration doesn’t look appealing, it’s harmless as long as the spots haven’t turned a dark color or have a mushy texture.

How to Remove Brown Spots from Cauliflower

While they aren’t harmful to eat, if you want to scrape away the largest or most prominent brown spots, this is easy to do. The easiest way to remove the brown spots is with a knife. Use the blade of a chef’s knife to scrape away the brown areas or trim the tops of the curds that are discolored.

When to Toss Your Cauliflower

If instead of pale brown, the spots are dark brown to black in color, the curds have taken on a mushy texture, or have an off-putting odor, it’s best to toss the head of cauliflower and get a fresh one. These are all signs of decay and spoilage.

What Are Those Brown Spots on My Cauliflower? (2024)

FAQs

What Are Those Brown Spots on My Cauliflower? ›

The culprit for this discoloration is oxidation, which happens naturally the longer cauliflower is stored. Oxidation is simply the natural change in the vegetable's color due to prolonged exposure to light and air.

Is it safe to eat cauliflower with brown spots? ›

Most people don't exactly feel enthusiastic when they think about the brown spots that pop up on apple slices, but that doesn't mean they won't eat them. You can think about cauliflower spots in a similar way. And yes, it's perfectly safe to eat cauliflower with a handful of unattractive spots on it.

What deficiency causes browning of cauliflower? ›

Boron deficiency causes browning in cauliflower. In general, the signs of boron deficiency are evident externally on plants after curd formation.

How to stop cauliflower from turning brown? ›

Seal in GladWare® food protection containers. Place whole cauliflower heads inside Glad® ClingWrap (loosely) or Glad® Zipper Bags. Add air holes for circulation. Wrap whole cauliflower heads in Glad® ClingWrap (loosely) or place in Glad® Zipper Bags.

When should you not eat cauliflower? ›

Avoid those with brown spots or loose, spread-out sections. Buy a head of cauliflower and separate it into its sections or florets. Or for convenience, purchase a tub of washed, precut florets. Cauliflower wrapped in a cellophane bag can trap moisture and speed up spoiling.

Can you cut spots off cauliflower? ›

If left in the refrigerator for too long, cauliflower can start to develop brown spots on the outside — but that doesn't mean the whole head is a lost cause. If this happens, just use a vegetable peeler to "peel" the spots off, and your cauliflower is good as new and ready to eat.

Is cauliflower fungus poisonous? ›

Some mycologists consider other species in the Sparassis genus to exist, but this is of little interest for the forager as none are poisonous.

What is a fungal infection that looks like cauliflower? ›

Chromoblastomycosis: This infection affects the tissue below the skin and the skin itself. It can cause warty patches of skin and lesions that look like cauliflower. The infection more commonly affects people who work on farms and is more common in tropical areas.

How to eat cauliflower fungus? ›

Most mushroom recipes call for sautéing, but deep-frying can be an excellent option. To fry cauliflower mushrooms, make sure they are very dry before tossing them in flour, dipping them in a beaten egg, and rolling them in breadcrumbs. Fry cauliflower mushrooms in 400-degree oil until crisp and golden brown.

What is brown rot in cauliflower? ›

Browning or brown rot

This is caused by Boron deficiency. It appears as water soaked areas and later changes into rusty brown. Spray one kg of Borax in 500 lit of water 30 days after planting.

Why is my cauliflower growing brown? ›

Browning occurs when the heads develop patches or a covering that's brown, yellow or red. This is often caused by a deficiency of the micronutrient boron, which may also cause yellowing in new leaves.

What is blight in cauliflower? ›

Spots develop concentric rings. Finally the spots coalesce leading to blighting of leaves. The fungus is seed borne and cause shriveling of seeds and poor germination. Linear spots also appear on petioles, stems, pods & seeds.

How do you bring cauliflower back to life? ›

WILTED. A quick soak in ice water for 5 to 10 minutes is often enough to reinvigorate wilted veggies.

How do commercial growers keep cauliflower white? ›

Although cauliflower plants love the sun, you should know that in most cases customers prefer white heads instead of slightly yellow ones. Thus, many farmers tie some outer leaves on the curds to prevent them from turning yellow.

How long is cauliflower good for in the fridge? ›

Moisture can lead to discoloration or decay of the cauliflower. You should also skip washing your cauliflower before storing it, but you should wash it once you're ready to use it. When properly stored, cauliflower can last up to three to five days in the fridge.

How do you know when cauliflower has gone bad? ›

As The Kitchn notes, cauliflower does see oxidative brown spots naturally, but it's not time to toss the cauliflower until the color turns from light brown to dark brown or black. That's the point of no return. Other telltale signs of spoilage for cauliflower include mold, off-smells, slimy texture, or soft spots.

Are brown spots on broccoli safe to eat? ›

First, check the color of the florets. They should be a bright, uniform green. If they have any yellow or brown spots, that's a sign your broccoli is starting to spoil. If you notice fuzzy white or black patches growing on the florets or the stem, that tells you that mold is starting to form, and it's time to toss it.

Can cauliflower last 2 weeks in the fridge? ›

Moisture can lead to discoloration or decay of the cauliflower. You should also skip washing your cauliflower before storing it, but you should wash it once you're ready to use it. When properly stored, cauliflower can last up to three to five days in the fridge.

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