Tomato vs Tomatillo: What's the Difference?
Short answer: A tomatillo is not an unripe tomato. It's a separate plant (Physalis philadelphica) that grows inside a papery husk and stays firm, tart, and citrusy even when ripe. Tomatoes (Solanum lycopersicum) are juicier, sweeter, and softer. Tomatillos are the base of green salsa; tomatoes are eaten across countless raw and cooked dishes.
| 🍅 Tomato | 🟢 Tomatillo | |
|---|---|---|
| Taste | Sweet-acid balance over a deep savory umami base (tomatoes are rich in natural glutamate); great ones taste sun-warmed and complex, refrigerated ones taste of nothing — the cold kills the aroma enzymes. | Tart, tangy, and slightly herbaceous with firm, seedy green flesh and a bright citrus-and-green-apple acidity; cooked, it mellows into a rich, savory tang — the sour green heart of salsa verde. |
| Type | Berry | Tropical & subtropical |
| Peak season | Summer, Year-round | Summer, Autumn |
| Origin | Andean South America (Peru/Ecuador); domesticated in Mesoamerica | Mexico and Central America |
| Calories (per 100 g) | 18 | 32 |
| Sugar (per 100 g) | 2.6 g | 3.9 g |
| Vitamin C (per 100 g) | 13.7 mg | 12 mg |
| Typical price | Budget | Budget |
Despite the shared name-ending and their both being members of the nightshade family, a tomato and a tomatillo are different plants with different uses. The tomatillo’s papery lantern-like husk is the instant giveaway.
A tomatillo (Physalis philadelphica) is more closely related to the cape gooseberry and ground-cherry than to the tomato. It grows inside a husk, is usually harvested green and firm, and stays tart and citrusy even when fully ripe, with a slightly sticky coating you rinse off. It’s the essential ingredient in Mexican salsa verde and green enchilada sauces, where its acidity does the heavy lifting.
A tomato (Solanum lycopersicum) has no husk, ripens soft and juicy, and turns sweeter and less acidic as it reddens. It’s the versatile one - raw in salads and sandwiches, cooked into countless sauces and stews. The two aren’t substitutes: swap a tomato into salsa verde and you lose the signature tang; swap a tomatillo into a caprese and it will taste startlingly sharp.
Frequently asked questions
Is a tomatillo just a green tomato?
No. Tomatillos are a different species (Physalis philadelphica, related to the cape gooseberry) that grow inside a papery husk. A green tomato is simply an unripe tomato. They aren't interchangeable in flavour.
What does a tomatillo taste like?
Bright, tart, and slightly citrusy, with a firmer flesh than a tomato. Cooking mellows the acidity. They're the tangy backbone of Mexican salsa verde.
How do I prepare a tomatillo?
Peel off the papery husk and rinse away the sticky film underneath, then use raw, roasted, or boiled. There's no need to seed or peel the fruit itself.