Tomatillo
Also called Mexican husk tomato
Tomatillos offer tangy acidity with an earthy undertone, great for salsas.
Tomatillos are small, firm green fruits wrapped in a papery husk, a staple of Mexican cooking for thousands of years. They look like little green tomatoes and are related to them, but the flavour is different: tart, bright and citrusy, with a fresh, green, slightly earthy finish. Under the husk the skin is a little sticky.
Cooks love them as the base of salsa verde and countless green sauces. Raw, they give a sharp, lively salsa; roasted or charred, they turn softer, sweeter and smokier; simmered, they melt into a tangy sauce for enchiladas, pork stews and chicken. They also contain plenty of pectin, so cooked tomatillo sauces thicken nicely on their own.
Flavor profile
Aroma: tangy, fresh, earthy
Good to know
Origin: Mexico
Forms: whole, salsa
Season: Tomatillos are a warm-weather crop, at their best from mid-summer to early autumn, though imported fruit is available year-round.
Nutrition: A tangy fruit used like a vegetable, adding fresh flavour and a little fibre with few calories.
Storage: Keep tomatillos in their husks in a paper bag in the fridge, where they stay fresh for up to 2 weeks; plastic traps moisture and encourages mould. Husk and rinse them just before using. They are past their best when soft, wrinkled, yellowing or mouldy. To freeze, husk, rinse, dry and freeze whole on a tray before bagging, for up to 6 months; or freeze cooked salsa verde in portions. Frozen tomatillos turn soft, so use them in cooked sauces.
How to use tomatillo
Salsa Verde Simplicity
Roast to reduce chlorophyll for sweeter sauce with softened texture.
Sauce for Days
Simmer tomatillos. Heat breaks down cellulose, boosting acidity and flavor.
The science of tomatillo
- Tomatillos are high in acids, mainly citric and malic, which is why they taste so much sharper than tomatoes. That acidity is the backbone of salsa verde and cuts through rich pork, cheese and avocado.
- The sticky film under the husk contains bitter-tasting plant compounds. Rinsing the fruit in warm water after husking removes the residue and keeps sauces tasting clean.
- Roasting or charring tomatillos under the grill until blistered softens their cell walls and drives off water, concentrating sugars and adding Maillard browning, so the sauce tastes rounder and less sharp.
- Cooking turns tomatillos from bright green to olive green as heat and their own acid convert chlorophyll to pheophytin. That colour change is normal; blending in fresh cilantro at the end brings back some brightness.
- Tomatillos are rich in pectin. As a cooked sauce cools, the pectin sets lightly, so salsa verde often thickens in the fridge and may need loosening with a splash of water.
How to choose tomatillo
Pick tomatillos that are firm and fill out their husks, which should be dry, intact and light green to tan rather than brown and shrivelled. Smaller ones tend to be sweeter. Avoid any that are soft, mouldy or have split skins.
Substitutes for tomatillo
| Swap | Amount | What changes |
|---|---|---|
| Green (unripe) tomatoes + lime juice | 1:1, plus a squeeze of lime | The closest swap for texture and tartness in salsas and sauces. |
| Canned tomatillos | about 1 can (790 g) per 450 g fresh | Already soft, so they are best in cooked sauces and stews. |
| Cape gooseberries (physalis) | 1:1 | A close relative, sweeter and fruitier; good in raw salsas. |
| Jarred salsa verde | to taste | A quick fix for enchiladas or braises; check the salt and heat before adding. |
What goes with tomatillo
- Cilantro. Cilantro's citrusy notes brighten tomatillo's tangy, tart profile.
- Avocado. Avocado's creaminess balances tomatillo's acidity for a smooth contrast.
- Lime. Lime boosts tomatillo's tangy acidity.
- Poblano. Roasted poblano and tangy tomatillo are the base of many Mexican green sauces.
- Pork Shoulder. Tangy tomatillo cuts the fat in pork shoulder stewed in green chile sauce.
- Salt. Salt tempers tomatillo's tang in salsas.
- Tortilla. Tangy tomatillo salsa verde is the classic sauce for tortillas and enchiladas.
- Jalapeño. Jalapeno adds a gentle heat overlaying tomatillo's tartness.
Mistakes to avoid
- Failing to husk leaves saponin residue, which is bitter.
- Overcooking loses citric acid, dulling tartness.
Ideas for tonight
- Chicken enchiladas with tomatillo sauce
- Pork and tomatillo stew with cilantro
- Grilled fish tacos with tomatillo and avocado salsa
Tomatillo: questions
What does a tomatillo taste like?
Tomatillos taste tart, bright and citrusy, with a fresh green, slightly herbal flavour. Raw they are sharp and crunchy; roasted they are softer, sweeter and a little smoky.
Are tomatillos the same as green tomatoes?
No. They are relatives in the nightshade family, but tomatillos grow inside a papery husk, have denser flesh and are much more acidic. Unripe green tomatoes are the best stand-in if you cannot find them.
Do you need to cook tomatillos?
No, they can be eaten raw in a sharp, fresh salsa. Cooking, roasting or charring mellows their acidity and brings out sweetness, which is how most green sauces are made.
How do you prepare tomatillos?
Peel off the papery husk, then rinse the fruit under warm water to remove the sticky coating. Cut out the stem scar, then chop for raw salsa or roast whole until blistered and soft.
Why is my salsa verde bitter?
Usually the sticky residue was not rinsed off, or the tomatillos were very underripe. Rinse them well, roast them to soften their edge, and balance with a pinch of salt and a little sweetness from onion.
Can you freeze tomatillos?
Yes. Husk, rinse and dry them, then freeze whole for up to 6 months. They turn soft when thawed, so use them for cooked salsa verde, stews and sauces.
What does tomatillo taste like?
Tomatillos offer tangy acidity with an earthy undertone, great for salsas. Its strongest notes are earthy, citrus, with an aroma that is tangy, fresh, earthy.
What goes well with tomatillo?
Tomatillo pairs best with cilantro, avocado, lime, poblano, pork shoulder. Cilantro's citrusy notes brighten tomatillo's tangy, tart profile.
How do you use tomatillo in cooking?
Salsa Verde Simplicity: roast to reduce chlorophyll for sweeter sauce with softened texture.
How should you store tomatillo?
Keep in a paper bag in the refrigerator for up to two weeks.
What is the most common mistake with tomatillo?
Failing to husk leaves saponin residue, which is bitter.
Cilantro
Poblano
Jalapeño
Lime
Avocado
Pork Shoulder
Tomato