Kohlrabi vs Celeriac: Taste, Nutrition, and Best Uses

Kohlrabi and celeriac occupy similar territory in the produce aisle — both are bulbous, pale-fleshed, somewhat intimidating-looking vegetables that most shoppers walk past without a second glance. Both get used as lower-carb alternatives to potatoes. Both require peeling before eating. And both are dramatically underappreciated.

But they’re quite different vegetables with distinct flavors, textures, and best uses. Choosing the right one for your recipe matters, and understanding the differences helps you cook better with both.

What They Actually Are

Kohlrabi is a member of the brassica family (Brassica oleracea) — the same species as broccoli, cauliflower, cabbage, and Brussels sprouts. Despite looking like a root vegetable, the edible bulb is actually a swollen stem that grows above ground. The name comes from the German “Kohl” (cabbage) and “Rabi” (turnip). For a complete overview, see our guide on what kohlrabi is.

Celeriac (Apium graveolens var. rapaceum) is a variety of celery bred specifically for its large, knobby root rather than its stalks. It’s also called celery root, turnip-rooted celery, or knob celery. Unlike kohlrabi, it actually is a root vegetable — the edible part grows underground.

They’re not closely related botanically. Kohlrabi is a cruciferous vegetable (family Brassicaceae); celeriac belongs to the carrot family (Apiaceae). They just happen to end up in similar culinary situations.

Appearance

Kohlrabi: Smooth, round, and compact. The skin is either pale green or purple, and the flesh inside is always white to cream-colored. It’s clean-looking — almost geometric in its roundness, with leaf stems sprouting from the surface like satellite antennae. Typically 7–10cm in diameter, though giant varieties can grow much larger.

Celeriac: Rough, gnarly, and irregular. The skin is tan to brown and covered in a tangle of small roots and crevices that trap soil. It looks like something dug up from a cave. Typically 10–14cm in diameter. Peeling it requires removing a thick, irregular layer to get to the smooth white flesh underneath.

In terms of sheer visual appeal, kohlrabi wins easily. Celeriac is one of the least attractive vegetables in existence, which partly explains why it’s so underused despite tasting excellent.

Taste Comparison

This is where the differences matter most.

Kohlrabi raw: Crisp, juicy, and mildly sweet. The flavor sits somewhere between a broccoli stem and a mild apple, with a clean finish and no bitterness. The texture is similar to a water chestnut — firm, snappy, and refreshing. Kohlrabi is one of the few brassica vegetables that’s genuinely good eaten raw with nothing more than a pinch of salt.

Celeriac raw: Firm and dense, with a pronounced celery flavor — not surprising, given what it is. There’s a nuttiness to it, almost like hazelnut, and a slight pepperiness. The texture is drier and denser than kohlrabi. Raw celeriac is edible and is the basis for the classic French céleri rémoulade (shredded celeriac in mustardy mayonnaise), but it’s stronger-tasting than kohlrabi and not as universally appealing raw.

Kohlrabi cooked: Softens but maintains some structure. The flavor becomes milder and slightly sweeter. Good roasted, steamed, sautéed, or in soups. Doesn’t develop the starchy, creamy quality of potatoes — maintains its own identity.

Celeriac cooked: Becomes soft and almost creamy, with an intensified celery-nutty flavor. Excellent mashed (celeriac mash is one of the great potato alternatives), in soups where it can be puréed into a velvety texture, and roasted where it caramelizes beautifully. Develops more complexity with heat than kohlrabi does.

The summary: Kohlrabi is milder and crisper. Celeriac is more flavorful and creamier. Neither is better — they just suit different applications.

Nutritional Comparison

Per 100g of raw vegetable:

Nutrient	Kohlrabi	Celeriac
Calories	27	42
Carbs	6.2g	9.2g
Fiber	3.6g	1.8g
Protein	1.7g	1.5g
Vitamin C	62mg (69% DV)	8mg (9% DV)
Potassium	350mg (7% DV)	300mg (6% DV)
Phosphorus	46mg	115mg
Vitamin K	0.1mcg	41mcg
Vitamin B6	0.15mg	0.17mg

Key differences:

• Vitamin C: Kohlrabi dominates. It has nearly 8 times more vitamin C than celeriac. This is kohlrabi’s standout nutritional feature — see our nutrition guide for the full breakdown.
• Calories and carbs: Kohlrabi is lower in both. If you’re counting carbs strictly, kohlrabi is the better choice.
• Fiber: Kohlrabi has twice the fiber of celeriac, gram for gram.
• Phosphorus: Celeriac has significantly more, which matters for bone health.
• Vitamin K: Celeriac has substantially more, relevant for people on blood thinners who need to monitor vitamin K intake.

Both are low-calorie, nutrient-dense vegetables. Kohlrabi has the edge on vitamin C and fiber; celeriac has the edge on minerals like phosphorus.

Texture Comparison

This is arguably the most important practical difference when cooking.

Kohlrabi has a crisp, juicy, almost apple-like texture when raw. When cooked, it softens but retains some bite — it never becomes truly creamy or fluffy. It holds its shape well in stews and soups, making it good for dishes where you want visible, distinct vegetable pieces.

Celeriac is denser and drier when raw. When cooked, it breaks down more readily and can be mashed to a smooth, almost potato-like consistency. This makes it superior for purées, mashes, and smooth soups.

What this means for substitution:

• If a recipe calls for potatoes and you want visible chunks (in a stew, roast, or gratin), either works, but kohlrabi will hold its shape better.
• If a recipe calls for mashed potatoes, celeriac is the better substitute — kohlrabi doesn’t mash to the same smooth consistency.
• If you want a raw application (salads, slaws, crudités), kohlrabi is vastly better. Raw celeriac works in rémoulade but isn’t great for casual raw eating.

Best Uses for Each

Kohlrabi Excels At:

• Raw preparations — slaws, salads, crudités, snacking
• Stir-fries — holds its crunch even with high heat
• Fries and chips — maintains structure when fried or baked
• Gratins — holds shape in layers without falling apart
• Pickling — the firm texture survives acid without going soft
• Low-carb applications — fewer carbs per serving than celeriac

Celeriac Excels At:

• Mashing — the best non-potato mash, with its own excellent flavor
• Puréed soups — creates a naturally velvety texture without cream
• Céleri rémoulade — the classic French preparation, shredded raw with Dijon mayonnaise
• Roasting — caramelizes more deeply than kohlrabi
• Flavor-forward dishes — its pronounced celery-nut flavor adds character
• Combining with potatoes — 50/50 celeriac-potato mash is a classic for a reason

Both Work Well For:

• Soups (chunky or puréed)
• Gratins and bakes
• Roasting (different results, but both good)
• As potato alternatives (in different ways)

Growing Comparison

If you grow your own vegetables, the differences here might influence your choice.

Kohlrabi is one of the easiest brassicas to grow. It’s fast (55–60 days from transplant for most varieties), relatively pest-resistant, and tolerates a range of conditions. You can succession-plant it through spring and fall for a nearly continuous harvest. It’s excellent for container growing and small spaces.

Celeriac is notoriously difficult. It has one of the longest growing seasons of any vegetable — 100 to 120 days from transplant — and needs to be started indoors 10–12 weeks before the last frost. It’s fussy about moisture, slow to establish, and the early growth phase is agonizingly slow. Many gardeners who try celeriac give up after the first season.

For our growing guide, see how to grow kohlrabi — it’s genuinely one of the most rewarding vegetables for beginning gardeners. Celeriac, by contrast, is a project for experienced growers with patience.

Storage Comparison

Both store well, but celeriac has the advantage here.

Kohlrabi keeps for 4–6 weeks in the refrigerator and 2–3 months in cold storage (root cellar or similar). It can also be frozen after blanching.

Celeriac is a storage champion. In a cool, humid root cellar, it keeps for 3–6 months — sometimes even longer. This is one of the reasons it was historically important in European cooking: it was one of the few vegetables available fresh through winter.

Price and Availability

Kohlrabi is increasingly available in mainstream supermarkets, though it’s still not universal. You’ll always find it at farmers’ markets during spring and fall. Price is typically moderate — comparable to other specialty vegetables.

Celeriac is more consistently available in European grocery stores than in American ones. In the US, you’ll find it most reliably at stores with a good produce section or at farmers’ markets. It’s usually priced similarly to kohlrabi, sometimes slightly higher.

Both vegetables are cheaper and more consistently available at farmers’ markets than in supermarkets.

Can You Substitute One for the Other?

Yes, with caveats.

Kohlrabi for celeriac: Works in most cooked applications. You’ll lose the celery-nut flavor and get a milder, slightly sweeter result. Add a small stalk of celery to the dish if you want to approximate the celery flavor component. Won’t work for mashing — kohlrabi doesn’t achieve the same smooth texture.

Celeriac for kohlrabi: Works in cooked applications but changes the flavor profile significantly. Won’t work well in raw applications — celeriac is too dense and strong-flavored to substitute for kohlrabi in salads and slaws.

The best approach: Treat them as complementary rather than interchangeable. They’re different vegetables that happen to share some applications. Keep both in your rotation and use each where it shines.

The Verdict

There is no “better” vegetable here. They’re different tools for different jobs.

Choose kohlrabi when you want:

• A mild, versatile, easy-to-prepare vegetable
• Raw eating and crisp texture
• Maximum vitamin C
• Fewer carbs and calories
• An easy vegetable to grow at home

Choose celeriac when you want:

• Rich, complex flavor
• Creamy texture when cooked
• A mash or purée
• Long-term winter storage
• The base for classic French preparations

Or, ideally, use both. They complement each other in dishes — a kohlrabi and celeriac gratin, for example, gives you the structural integrity of kohlrabi with the flavor depth of celeriac. A winter soup made with both has more complexity than either alone.