Ingredients

Equipment Needed

• •Heavy granite mortar and pestle (krok hin), at least 7 inches diameter
• •Small dry pan for toasting spices

Instructions

1. 1

   Soak the dried chilies

   Remove the stems from the dried red spur chilies and shake out most of the seeds. Soak them in warm water for 15 minutes, just until pliable. Not soft. You're hydrating the flesh so it can be pounded, not making chili soup. Drain, then squeeze each chili firmly to remove excess water. Wet chilies dilute the paste. You want them flexible, not waterlogged.

   Twenty chilies sounds extreme. It's not. This is Southern Thai. The dried spur chilies (prik haeng) are moderately hot, not volcanic. Their job is twofold: heat and deep red color. If you use fewer, the paste loses its identity. Start here. Adjust next time if you must.
2. 2

   Toast the whole spices

   In a small dry pan over medium-low heat, toast the coriander seeds and cumin seeds separately. Coriander first: shake the pan gently for 2-3 minutes until the seeds turn a shade darker and the kitchen smells warm, citrusy, almost floral. Transfer them out. Then the cumin: 1-2 minutes, until fragrant and barely darkened. Cumin burns fast, so keep your eyes on it. Toasting cracks open the essential oils locked inside the seed coat. Raw coriander is grassy. Toasted coriander is complex. That's the science.

   Toast them separately because they have different burn points. Coriander is forgiving. Cumin is not. Thirty seconds of inattention and your cumin is bitter charcoal. Ajarn always said: the nose tells you before the eyes do. When you smell it, it's done.
3. 3

   Pound the dry foundation

   Add the salt to your granite mortar (krok hin). Drop in the white peppercorns. Pound until the peppercorns are cracked and ground. The salt acts as an abrasive, gripping the peppercorns so they break instead of bouncing. Now add the toasted coriander and cumin seeds. Pound until everything is a fine, sandy powder. This is the dry spice base of the paste. No chunks. The aromatics need to be fully broken so they integrate evenly into the wet ingredients that follow.

   Coriander seeds and cumin are not typical in Central Thai pastes. Their presence here is the fingerprint of Southern Thai cuisine, a reflection of Indian and Malay spice traditions that entered through the southern ports. Regional attribution matters. This is not a Bangkok paste.
4. 4

   Pound the dried chilies

   Add the drained, squeezed dried chilies to the mortar in two batches. Pound the first batch down before adding the second. The chilies are fibrous and resistant. They'll fight you. Keep pounding. You need to break every fiber until the chilies become a rough, damp mass that merges with the spice powder below. This takes 3-4 minutes of steady work. When the chili mass is uniform with no large flakes remaining, you're ready for the next stage.

   The reason chilies enter early (while the paste is still dry) is physics. Fibrous ingredients need maximum contact with the stone surface to break down. A wet mortar lets them slide. A dry mortar lets the stone grip and shred. Hardest first. That's the law of the krok.
5. 5

   Pound the fibrous aromatics

   Now the aromatics, in order. First the lemongrass: pound it into the chili mass until the fibers break and you can smell the sharp, citral brightness filling the room. Lemongrass provides the top note, the high-pitched citrus that lifts the paste. Next the galangal: harder than ginger, piney, almost medicinal. Pound until no pieces remain visible. Then the star: fresh turmeric root. The moment it enters the mortar, everything turns gold. Turmeric provides earthy depth, gentle bitterness, and the color that defines every Southern Thai paste. Pound until the paste is a uniform deep yellow-orange. Finally, the kaffir lime zest: those intensely perfumed strips of green. Pound them in and the aroma shifts, suddenly brighter, more alive. Each ingredient changes the paste. You can smell the transformation happening in layers.

   Fresh turmeric is not powdered turmeric. Not even close. Fresh turmeric root has a muddy, peppery earthiness that the powder completely lacks. The powder is a ghost of the real thing. If you can find fresh turmeric (Asian grocers, Indian markets), you have no excuse to use powder. This ingredient is why the south tastes like the south.
6. 6

   Pound garlic and shallots

   Add the sliced garlic and pound it into the paste. Garlic breaks down quickly because it's high in moisture and low in fiber. Thirty seconds and it should be incorporated. Now the shallots, which are the sweetness of the paste. Not sugar-sweet. The gentle, allium sweetness that rounds out the chili and turmeric. Pound the shallots in batches if your mortar is getting full. The paste is getting wetter now, which is normal. The shallot moisture helps everything bind. Keep pounding until the texture is smooth and cohesive. You should not be able to identify any individual ingredient by sight.

7. 7

   Finish with shrimp paste

   Add the kapi (shrimp paste) last. This is the umami anchor. One tablespoon of fermented shrimp that provides a deep, savory bass note underneath all that chili and turmeric. Pound it in for another minute until the paste is completely uniform. The color should be a deep golden-orange with red undertones from the chilies. The aroma should be intense: turmeric, chili, lemongrass, shrimp paste, toasted spices all hitting you at once. If the smell fills the room, you're done. If it doesn't, keep pounding.

   Kapi is last because it's already soft. It needs integration, not breaking down. Ajarn always said: the order of the mortar is a principle, not a suggestion. Hardest to softest. Every time. Krok ก่อน, krok ก่อน.
8. 8

   Test the paste

   Take a small pinch of the finished paste and fry it in a dry wok or pan for thirty seconds. Taste it. You should get immediate chili heat, then the earthy turmeric middle, then the lingering funk of kapi at the back. If it tastes flat, you probably didn't toast your spices well enough. If it tastes one-dimensional, you didn't pound long enough for the ingredients to merge. A properly pounded kreung tam doesn't taste like a list of ingredients. It tastes like one thing: Southern Thai fire.

Chef Tips

• •This paste builds three of the south's greatest dishes. Khua kling: dry-fry the paste with minced pork (moo), chicken (gai), or beef (neua) in a screaming hot wok, add nam pla, tear in kaffir lime leaves at the end. No coconut milk. No liquid. The paste coats the meat completely. That's the dish. You can also use this paste as the base for gaeng luang (Southern sour curry with fish) by thinning it with tamarind water, or stir it into gaeng tai pla (fermented fish innard curry) for the deep south's most notorious preparation.
• •Dried red spur chilies (prik haeng) are the standard for Southern pastes. They're 3-4 inches long, moderately hot, and provide deep red color. Don't substitute with bird's eye (too small, too sharp) or guajillo (wrong flavor profile entirely, that's Mexican). If you can only find generic dried red chilies at an Asian grocer, those will work. The point is quantity: twenty is not excessive for the south.
• •Fresh turmeric stains everything it touches. Your mortar, your fingers, your cutting board, your shirt. Wear gloves if you care about your hands. I don't. The yellow fingers tell people you've been cooking Southern Thai. But scrub your granite mortar with baking soda paste after you're done, or the next paste you make will have a turmeric ghost in it.
• •The difference between a good kreung tam and a great one is pounding time. Most people stop too early. When you think you're done, pound for three more minutes. The paste should be smooth enough that you can't distinguish individual ingredients, and the oil from the spices and aromatics should make it slightly glossy. If it's still grainy, you're not there yet.

Advance Preparation

• •The finished paste keeps in an airtight container in the refrigerator for up to 5 days. Press plastic wrap directly onto the surface to prevent oxidation and color loss.
• •For longer storage, freeze the paste in ice cube trays or small containers for up to 3 months. Each cube is roughly one serving of khua kling. Frozen paste goes directly into the hot wok. No need to thaw.
• •Do not make the paste in advance and leave it at room temperature. The fresh turmeric and shallot moisture will turn it in hours. Refrigerate immediately after pounding.

Frequently Asked Questions

Nutrition Information

1 serving (about 63g)