Making Thai Curry Paste in a Food Processor

Yes, you can absolutely make Thai curry paste in a food processor. It is a quick, reliable way to blitz fibrous aromatics like lemongrass and galangal into a smooth, intensely fragrant paste. The key is to slice the tough ingredients thinly, add a little liquid to help the blades turn, and scrape down the sides a few times to get an even, spoonable texture. In under fifteen minutes, you can produce a fresh, vivid green or red paste that outshines most jarred versions.

What Are the Essential Ingredients and What Do They Look Like?

Thai curry paste is built on a foundation of fresh aromatics. Each ingredient brings a distinct colour, shape, texture and aroma to the blend.

Lemongrass

Lemongrass looks like a pale green, woody stalk with a bulbous base. Its scent is citrusy and clean, almost like lemon verbena. Only the tender lower 10–12 cm (4–5 inches) are used. Peel away the tough outer leaves, trim the very base, and slice thinly across the grain before adding to the processor. This helps break down its fibrous texture so it blends smoothly rather than leaving stringy bits.

Galangal

Galangal is a rhizome related to ginger but looks pinkish-white with brown rings and a harder, woodier texture. Its aroma is sharp, piney and medicinal, with a peppery afternote. It cannot be substituted with ordinary ginger without losing that classic Thai character; if you cannot find galangal, use a smaller amount of fresh ginger and add a strip of lime zest, but the result will be less authentic. Peel and slice it thinly for the processor.

Green Chilies

For green curry paste, fresh green Thai bird’s eye chilies give heat and a grassy, bright pungency. They are small, thin and pointed, about 2–4 cm (1 inch) long. Remove the stems but keep the seeds for more fire. The chilies also contribute the paste’s emerald green colour, intensified by fresh coriander roots and leaves.

Other Aromatics

Shallots, garlic, fresh coriander roots, and sometimes kaffir lime zest or shrimp paste round out the flavour. Shallots add sweetness, garlic gives a savoury depth, and coriander roots have an earthy, citrusy perfume. Shrimp paste (kapi) is a dark, salty, umami-rich block that may be omitted for a vegetarian version; use a little light soy sauce or miso as a weaker substitute.

What Does the Food Processor Contribute?

A food processor is ideal for curry paste because its powerful motor and sharp S-shaped blade can handle dense, fibrous ingredients that would choke a blender. The wide, flat processor bowl allows ingredients to be chopped evenly and then puréed with a small amount of liquid.

Processor Bowl and Batch Size

The size of the processor bowl matters. For a standard recipe yielding about 250 g (1 cup) of paste, a 7–10 cup processor works best. Too small a bowl will leave unblended chunks; too large a bowl may not catch the ingredients under the blade. If you have a mini processor, work in small batches and then combine. A larger batch can be made in a full-size machine, but avoid overfilling past the halfway mark, as the paste needs room to circulate.

Paste Texture

Thai curry paste should be a fine, moist paste with no visible fibres. It is thicker than a sauce but smooth enough to dissolve in coconut milk. Pulse first to break down the hard pieces, then process continuously, scraping the sides with a spatula every 30 seconds, until the mixture forms a cohesive, slightly oily paste. If too dry, add a tablespoon of water or a splash of coconut milk; if too wet, it will become a purée, which is acceptable but weaker in flavour.

Step-by-Step: How to Make Thai Green Curry Paste in a Food Processor

This recipe makes about 1 cup of fresh paste, enough for one large curry for 4–6 people.

1. Prep the aromatics. Slice 3 stalks lemongrass (tender part only), 4–5 green bird’s eye chilies, 4 shallots, 5 garlic cloves, 3 cm piece of galangal, and 2–3 coriander roots or 4 stems. Thin slices are essential.
2. Toast dry spices. In a dry pan, lightly toast 1 teaspoon coriander seeds and ½ teaspoon cumin seeds until fragrant, about 1 minute. Cool and grind in a spice grinder or the processor first.
3. Combine in processor bowl. Add all fresh ingredients, ground spices, 1 teaspoon shrimp paste (optional), and 1 teaspoon salt to the bowl.
4. Pulse to break down. Pulse 10–15 times until the ingredients look finely chopped, scraping the sides between pulses.
5. Blend until smooth. With the machine running, drizzle in 2–3 tablespoons of water or coconut milk through the feed tube. Process for 1–2 minutes, stopping to scrape down the bowl every 30 seconds, until you have a smooth, slightly grainy paste.
6. Check consistency and seasoning. Taste for salt and heat. Add more chilies for spiciness or a little lime zest for brightness. The paste will deepen in flavour if rested for 30 minutes before use.

How Does Thai Curry Paste Differ from Similar Blends?

Thai curry paste is a fresh, uncooked blend, unlike Indian curry pastes which often include roasted spices and tomato. It is also different from a spice powder because it contains fresh herbs, chilies and roots. The table below compares green and red Thai curry pastes, which are the most common.

What Are Some Common Dishes That Use the Paste?

The most famous dish is Gaeng Keow Wan (green curry), made by frying the paste in coconut cream, adding chicken or tofu, then simmering with coconut milk, Thai eggplants, bamboo shoots, fish sauce and palm sugar. Red curry paste is used in Gaeng Phed with roasted duck or beef. Both pastes can be thinned with coconut milk and used as a marinade or stir-fry sauce. Fresh paste also makes an excellent base for spicy Thai soups like tom yum, though traditional tom yum uses a different paste.

What If I Don’t Have a Food Processor?

You can still make Thai curry paste using a large mortar and pestle. This traditional method produces the best texture because the ingredients are pounded, releasing oils and fibres more gently. Start with the hardest ingredients (lemongrass, galangal), pound to a paste, then add the rest. A blender can work for softer mixtures but often struggles without enough liquid; add a few tablespoons of water and blend in short bursts, scraping frequently. The paste will be thinner.

How Should I Store Fresh Curry Paste?

Fresh Thai curry paste can be kept in an airtight container in the refrigerator for up to 5 days. For longer storage, freeze in ice cube trays; once solid, transfer cubes to a freezer bag. Each cube is about 1 tablespoon, perfect for a small curry. Frozen paste keeps for 2–3 months without much loss of flavour.