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Prawn And Sweet Potato Massaman Curry

By colm
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prawn and sweet potato massaman

Prawn and sweet potato massaman curry – A mild and mellow Thai broth made with succulent tiger prawns and tender chunks of brightly coloured sweet potato.

Out of all the curries on the planet the massaman is definitely a favourite. I’ll order in the odd Indian from time to time and enjoy a biryani, a masala, or a jalfrezi now and again. If I’m doing a curry at home though, i’ll nearly always opt for a mild and creamy Thai massaman.

The massaman curry is quite unique. It gives you the best of both worlds, both Indian and Thai. It’s an infusion of all those pungent flavours you associate with south-east asia. Coconut, lime, garlic, chilli, ginger, and lemongrass, plus a list of Indian spices that ordinarily would have no business in a Thai curry. Cumin, cardamom, cinnamon, star anise, nutmeg, and turmeric all feature in the curry paste used to make a massaman.

shrimp massaman

There’s a couple of theories on the origins of the massaman and how these fragrant Indian spices ever ended up it a Thai curry in the first place. Some say that the dish came from southern Thailand where the food is a bit more influenced by Malay and Indian cuisine. However according to one of my favourite chefs and renowned Thai food guru David Thompson the dish originated in the royal Thai court in the 17th century, brought over by Persian merchants.

What ever its origins the cook who first put it together was ingenious. Blending such a long list of different herbs and spices was either a lucky accident or took a lot of thought and skill.

It’s also the reason that the ingredients list for this curry recipe is so long. However don’t be put off. If you can pick up a massaman curry paste at your nearest Asian market you’ll cut the list in half and save yourself a ton of work.

ingredients for massaman curry

I suppose you could call this cheating and I used to think that in order to cook authentic Thai food than you had to make your own paste. I had a romantic idea that the Thais sat around all day peeling garlic, ginger, and shallots than pounding the crap out of them in a mortar and pestle. Having visited the country a couple of times I now know the Thais get their curry paste in the same place we do, down at tesco.

There’s absolutely nothing wrong with this. A store-bought curry paste is nearly as good as any you could make at home. The only real downside is that you have no control over how many chillies go in there and how fiery it is. There’s some very tasty red and green curry pastes you can get at the big chain supermarkets. My take on store-bought ingredients is that if I can’t make better myself than I’ll save the time.

toasting spices for a massaman curry

Unfortunately for me massaman curry paste isn’t as common as red and green. The only place to pick it up is the asian markets in Dublin city centre, and you couldn’t pay me to go in there on a saturday a couple of weeks before christmas.

This meant making my own paste and a little extra peeling, slicing, and chopping. Most of the heavy lifting can be done by your food processor. Purists might say that a curry paste should only be made with a mortar and pestle and maybe their right.

However here in the west most people’s kitchens are only equipped with the small version, one you can use to grind up spices and to make curry paste you’ll need something a whole lot bigger. In Thailand they have these really large ones with a pestle about have the size of a baseball bat. It’s the food processor of the traditional Thai kitchen and they use it regularly for jobs such as curry paste and to make their famous papaya salad.

massaman curry paste

The massaman is also one of the few curry recipes to feature the humble spud. Maybe it’s because I’m Irish but I think putting potatoes in a curry is a great idea. Most massaman curry recipes just use regular potatoes, but here I used the brightly orange coloured sweet potato. It gives a little balance to the massaman which can be quite sour. it’s this use of potatoes along with coconut, peanuts, and dried spices that keep a massaman mild and mellow despite the use of quite a bit of hot chilli.

One of the things to envy about Asian food is the amount of ingredients that you can use to season food. With traditional western cuisine if we want to season something we really only have salt and pepper. With Asian food you could use soy or fish sauce. If we want to add a little sourness to a dish there’s just vinegar. Out in the east you’ve a lot more choice, lemon grass, tamarind, lemon, lime zest, juice, and leaves can all be used to spice it up.

limes in a massaman curry

This is just something to bear in mind when you’re making any Thai curry. The quantities of these ingredients aren’t set in stone. Thier more of a guideline, add a little more or less till you have the curry just the way you like it.

Maybe it’s because of its muslim roots but traditionally a massaman curry is made with chicken not pork. I’ve seen a lot of recipes around for it using beef. Something they’d never do in buddhist Thailand where the cow is revered as a working animal. You don’t see all that many recipes for it with seafood but crustaceans like prawns, shrimp, and crab work really well with Thai spices.

prawn and sweet potato massaman curry

It’s also a great recipe for vegans or vegetarians just leave out the fish, meat, and stock. Then add any veggies you like. If you use a good curry paste and coconut milk you can’t go far wrong.

What will you put in your massaman?

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prawn massaman

Prawn And Sweet Potato Massaman Curry

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  • Prep Time: 30 minutes
  • Cook Time: 45 minutes
  • Total Time: 1 hour 15 minutes
  • Yield: 4 big portions 1x


The quantities given here for the curry paste make about a cup. You’ll only need 2 tablespoons to make the curry. The rest will keep in the fridge for about a week. Alternatively divide it up into smaller batches and pop it in the freezer.



For the massaman curry paste

  • 6 whole cardamom pods
  • 6 whole cloves
  • 1 1” piece of a cinnamon stick
  • 2 tablespoons of coriander seeds
  • 2 teaspoons of cumin seeds
  • 2 green chiles
  • 1 red chilli
  • 1 whole bulb of garlic, peeled
  • 3 lemongrass stalks, tough outer layers removed, and roughly chopped
  • 4 medium sized shallots, peeled and roughly chopped
  • 1 1½” piece of galangal, peeled and roughly chopped
  • 1 1½” piece of ginger, peeled and roughly chopped
  • ½ cup of coriander
  • ½ cup of salted, dry-roasted peanuts
  • 1 teaspoon of chilli flakes
  • ½ a teaspoon of ground nutmeg
  • ½ a teaspoon of ground turmeric.
  • ½ a cup of vegetable oil

For the massaman curry

  • 2 tablespoons of vegetable oil
  • 2 heaped tablespoons of massaman curry paste
  • 400ml of fish stock
  • 400ml of coconut milk
  • 6 shallots, roughly chopped
  • 2 cinnamon sticks
  • 4 star anis
  • 4 kaffir lime leaves
  • 300g of sweet potato, peeled and diced into half inch chunks
  • the juice of 3 limes
  • 2 tablespoons of fish sauce
  • 2 tablespoons of tamarind paste
  • 40g of palm sugar
  • 400g of tiger prawns
  • 1 head of bok choy, roughly chopped
  • 100g spring onions, sliced
  • 25g of coriander, chopped


To make the curry paste

  1. Split the cardamom pods in half and remove the black seeds from the outer green husks.
  2. Cut the cinnamon stick into small pieces and add into the cardamon followed by the cloves, coriander seeds, and cumin seeds.
  3. Heat a pan on the stove and gently toast all the spices for a couple of minutes to release their flavour. Than transfer them to a mortar and pestle and grind them up to a fine powder. set aside while you make the rest of your paste.
  4. Place the chillies, garlic, lemongrass, shallots, galangal, ginger, coriander, and half your roasted peanuts in a blender and whizz to a fine paste. Than add in the nutmeg, turmeric, chilli flakes, and the spices you toasted earlier. Give the paste a final blitz and loosen it a little with the vegetable oil.

To make the curry

  1. To make the curry heat the vegetable oil in a large pan or wok. Add in the curry paste and fry over a high heat for about minute, stirring constantly so it doesn’t burn.
  2. Add in the fish stock and coconut milk and bring the curry up to a gentle simmer. Next, in go the shallots followed by the cinnamon, star anise, kaffir lime leaves, and sweet potato.
  3. Cook the curry for about 15 minutes until the sweet potatoes are tender and all the flavours are well mingled.
  4. Add the fish sauce, tamarind paste, lime juice, and palm sugar to the curry and mix in well. Give your curry a quick taste and adjust the flavour to your own liking. If it needs more salt, then add in a little more fish sauce. Not sweet enough, than add another spoon or two of sugar. If you like it sour than squeeze in a little more lime or tamarind paste.
  5. Finally in go your prawn, bok choy, spring onions, chopped coriander and the remaining peanuts. Give it a good stir and finish the curry by simmering gently for a minute,
  6. Serve up by spooning the curry over some steamed jasmine rice.

5 thoughts on “Prawn And Sweet Potato Massaman Curry”

  1. Good work Colm,

    Love some of those recipes. Will try some out on my wife and let you know what happens…Good Luck & thanks. Roy

  2. i forgot to add how much i love your placement of the star asise, cinnamon stick, and that small upturned bok choy leaf on the right side of the bowl of curry (second image from top). your brilliant composition did not go unnoticed. in fact, it made me smile and sigh :-)

  3. david thompson was a game changer for me. i cooked and adored his book so much i found myself purchasing a second copy just in case they stopped printing it and i did something stupid like leave my copy on a park bench or started eating the pages for lunch or aliens invaded or something… stupid? maybe. something i was compelled to do? definitely. because of my japanese dna, i also find potatoes in curry a big, big sell. now, add that fact to your tiger prawn and “sweet” potato twist = i can easily see this fitting into my holiday serves. maybe even dungeness crab, yeah? i think my mind is making clicking noises from running on idea overdrive now. i am grateful~


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