Isaan Sour Sausage (Sai Krok Isan)
Tangy, garlicky pork and rice sausages from northeastern Thailand, left to ferment until pleasantly sour, then grilled until the skin blisters and chars. Eaten hot off the grill with raw cabbage, fresh herbs, chilies and garlic.
Servings
Ingredients
Nutrition
Per serving
Steps
Pound the garlic
Pound the garlic cloves with the salt in a mortar, or chop very finely, until you get a wet, fragrant paste. This paste carries the flavour through the whole sausage, so it should be smooth, not chunky.
- 10 cloves garlic
- 1 tbsp salt
✅ Done when: the garlic turns into a rough, wet paste with no large pieces left
Mix the filling
In a large bowl, combine the minced pork, cooled rice, garlic-salt paste, sugar and MSG if using. Mix and knead with your hands for 4–5 minutes, squeezing the mixture through your fingers, until it turns pale and sticky. This kneading is what makes the sausage hold together and feel springy once cooked, not crumbly.
- 500 g pork shoulder
- 150 g cooked rice
- 2 tbsp sugar
- 1 tsp MSG (optional)
✅ Done when: the mixture is pale pink, sticky, and clumps together firmly when pressed
Stuff the casings
Slide the soaked casing onto a sausage funnel or the wide end of a piping bag fitted with a plastic nozzle. Fill it with the pork mixture, packing it firmly but without overstuffing, then twist into links about 10–12 cm long. Prick each link a few times with a toothpick to let trapped air escape, so the casing does not split later.
- 2 m hog casings
✅ Done when: the links are plump, evenly filled, and have no large air pockets
Ferment the sausages
Lay the sausages in a single layer on a tray or rack, cover loosely with a clean cloth, and leave at a warm room temperature (ideally not above 30°C/86°F) for 24 to 48 hours. Natural bacteria on the rice and pork turn the starch into lactic acid, which is what gives the sausage its sour tang and firms up the texture. Taste a sliver after 24 hours; the longer it sits, the more sour it gets.
✅ Done when: the sausage feels firm, smells pleasantly sour and tangy, not sour-rotten or off
Poach until cooked
Bring a pot of water to a gentle simmer, around 80°C (176°F), not a hard boil. Lower in the sausages and poach for about 15 minutes, until a thermometer inserted into the thickest one reads 71°C (160°F). This step cooks the pork fully through before grilling, so the sausage is both safe to eat and still tender inside.
✅ Done when: the internal temperature reads 71°C (160°F) and the meat is no longer pink
Grill until charred
Brush a hot grill or grill pan with the oil. Grill the sausages over medium-high heat for 8–10 minutes, turning often, until the skin blisters, chars lightly in spots, and turns deep golden-brown.
- 1 tbsp vegetable oil
✅ Done when: the casing is blistered and charred in places, and the sausages are hot all the way through
Serve
Cut the sausages into bite-size pieces and pile onto a plate. Serve hot with mint, cilantro, cabbage wedges, raw chilies, raw garlic cloves and lime wedges, so everyone can wrap a bite with herbs and a squeeze of lime.
- to serve mint leaves
- to serve cilantro sprigs
- to serve cabbage wedges
- to serve Thai chilies
- to serve raw garlic cloves
- to serve lime wedges
Pound the garlic
Pound the garlic cloves with the salt in a mortar, or chop very finely, until you get a wet, fragrant paste. This paste carries the flavour through the whole sausage, so it should be smooth, not chunky.
- 10 cloves garlic
- 1 tbsp salt
✅ Done when: the garlic turns into a rough, wet paste with no large pieces left
Mix the filling
In a large bowl, combine the minced pork, cooled rice, garlic-salt paste, sugar and MSG if using. Mix and knead with your hands for 4–5 minutes, squeezing the mixture through your fingers, until it turns pale and sticky. This kneading is what makes the sausage hold together and feel springy once cooked, not crumbly.
- 500 g pork shoulder
- 150 g cooked rice
- 2 tbsp sugar
- 1 tsp MSG (optional)
✅ Done when: the mixture is pale pink, sticky, and clumps together firmly when pressed
Stuff the casings
Slide the soaked casing onto a sausage funnel or the wide end of a piping bag fitted with a plastic nozzle. Fill it with the pork mixture, packing it firmly but without overstuffing, then twist into links about 10–12 cm long. Prick each link a few times with a toothpick to let trapped air escape, so the casing does not split later.
- 2 m hog casings
✅ Done when: the links are plump, evenly filled, and have no large air pockets
Ferment the sausages
Lay the sausages in a single layer on a tray or rack, cover loosely with a clean cloth, and leave at a warm room temperature (ideally not above 30°C/86°F) for 24 to 48 hours. Natural bacteria on the rice and pork turn the starch into lactic acid, which is what gives the sausage its sour tang and firms up the texture. Taste a sliver after 24 hours; the longer it sits, the more sour it gets.
✅ Done when: the sausage feels firm, smells pleasantly sour and tangy, not sour-rotten or off
Poach until cooked
Bring a pot of water to a gentle simmer, around 80°C (176°F), not a hard boil. Lower in the sausages and poach for about 15 minutes, until a thermometer inserted into the thickest one reads 71°C (160°F). This step cooks the pork fully through before grilling, so the sausage is both safe to eat and still tender inside.
✅ Done when: the internal temperature reads 71°C (160°F) and the meat is no longer pink
Grill until charred
Brush a hot grill or grill pan with the oil. Grill the sausages over medium-high heat for 8–10 minutes, turning often, until the skin blisters, chars lightly in spots, and turns deep golden-brown.
- 1 tbsp vegetable oil
✅ Done when: the casing is blistered and charred in places, and the sausages are hot all the way through
Serve
Cut the sausages into bite-size pieces and pile onto a plate. Serve hot with mint, cilantro, cabbage wedges, raw chilies, raw garlic cloves and lime wedges, so everyone can wrap a bite with herbs and a squeeze of lime.
- to serve mint leaves
- to serve cilantro sprigs
- to serve cabbage wedges
- to serve Thai chilies
- to serve raw garlic cloves
- to serve lime wedges
The Story Behind the Dish
Sai krok Isan comes from the Isaan region, a part of Thailand with strong ties to Lao food culture, where sour, fermented flavours show up in many everyday dishes. Fermenting ground pork with cooked rice and garlic was a practical way to preserve meat before refrigeration, while also building a distinctive tangy flavour that needed no vinegar.
Once an Isaan specialty, the sausage travelled with migrant workers to Bangkok and beyond, and street vendors now grill it on charcoal braziers across the country, serving it with raw cabbage, herbs, chilies and garlic for a sharp, fresh contrast.
⭐ Why It's Famous
Its sour, garlicky punch and charred, blistered skin make it one of Thailand's most addictive grilled street snacks, unlike any other sausage in the region.
💡 Fun Fact
Unlike many Southeast Asian sour sausages that rely on added vinegar or starter cultures, sai krok Isan ferments naturally using only cooked rice, garlic and the bacteria already present in the pork.
Isaan region, northeastern Thailand
16.43°N, 102.82°E
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