Prawn Paste Chicken (Har Cheong Gai) Recipe: The Cze Char Version
Cze Char Style Har Cheong Gai (Prawn paste chicken)
Har Cheong Gai (prawn paste chicken) is one of those dishes that Singaporeans all love but is little known by tourists coming to our island city. Indeed, if you ask any westerner if they would like to try chicken that has been marinated in a putrefied prawn paste, I think they would probably think you are pulling a fast one on them. But for those of us in the know, Har Cheong Gai is the epitome of fried chicken wings. Plump and bursting with umamilicious juices on the inside encased in a shatteringly thin and crisp crust, it is hard to imagine how fried chicken wings can be any better!
I have been searching for an authentic Har Cheong Gai recipe for quite a while. Unfortunately, none of the ones on the internet could give me a Har Cheong Gai like the ones I get at the Cze Char. The way to make Har Cheong Gai is unique amongst other fried chicken recipes in that the chicken is not just marinated first and then either dipped into a batter or dusted with a flour mixture before deep frying. With Har Cheong Gai, the batter is added to the marinade right at the beginning and then the chicken is left to marinade overnight. I am still trying to figure out why it is done this way. Perhaps it makes it easier for the Cze Char Chef bring out the whole box of pre-marinated chicken from the fridge and deep fry some straightaway and keep the rest till the next customer? Whatever the reason, the results are amazing.
Like all my other hawker recipes, this recipe came about through interrogating many Cze Char hawkers and chefs. No one will fully reveal their recipes to you but everyone will tell you a bit here and there. So, when you ask enough chefs, you will be able to piece it together eventually.
The first piece of the puzzle was actually revealed to me by Ah Yoke of Siang Hee back in 2009. She told me that to make really good Har Cheong Gai, you have to get a specific brand of shrimp sauce from Hong Kong. She then showed me the bottle in the photo below. Then she went to the fridge and took out a plastic box where the chicken is already marinated together with the batter and told me that this was her Har Cheong Gai which is ready for the fryer. She stopped short of revealing the recipe for the batter but simply smiled and said that she uses 7 different kinds of flours in order to get the texture that she wants!
Shrimp Sauce Marinade
For those who are unfamiliar with Shrimp Sauce, I must warn you that the first time you open the cover, you probably wonder if the stuff has gone bad. It stinks like a rugby boy's underpants which has been left in the rucksack for a week. No one in his right mind would ever think about sticking a finger into the jar and tasting it. Like other umami rich ingredients, Shrimp sauce is made from shrimp which has been fermented such that the proteins are broken down into amino acids like glutamates and inosinates which give dishes that intense savoury flavour. It is essentially the same process as producing parmesan cheese or soy sauce. You won't be able to buy this from the supermarket. (There is the Lee Kum Kee brand but it is not as pungent) I get mine from two places; the dry goods stores at the wet market and Victoria Wholesale Centre. You should be able to buy this from your nearest wet market.
Marinaded wings ready for the fryer
The 2nd part of the equation is to figure out how to get the batter right. This technique of mixing the batter into the marinade is quite unique to this dish. It is similar to the "Velveting" technique which is popular in Chinese cuisine. I first learnt about this technique during a fishing trip where I had some of the best wings ever. The cook on the boat used the same technique of marinating the wings in batter before deep frying and the crust was thin and crisp. When I asked her what she used, she simply told me that it was a pre-mix tempura flour which you can get from the supermarkets. That is certainly a good alternative if you don't want to mix your own flour. I have tried using "Dragon Boat Crispy Flour" from Kwong Cheong Thye which also works really well. But I realize that there will be many readers from overseas who will not be able to buy this particular brand of pre-mix, so I really needed to get back to basics. After a series of trials and errors, I eventually settled on a 50:50 mix of plain flour and potato starch which gave me the kind of light, flaky crisp crust which does not turn chewy and hard after resting. Potato starch is used to coat chicken chops in Taiwanese "Shilin" fried chicken and I have always felt it is a great starch for deep frying. Some recipes have called for corn flour, but in my experience, corn flour tends to produce a crust which is thick and tough rather than delicate and crispy.
You might think the deep frying part is quite straightforward, but the Cze Char chefs tell me that there is a certain way to deep fry the chicken so that it is crispy and dry when its served. To do this the chicken needs to go into the oil at a high temperature and then the heat is lowered once the crust is formed.
For those of you who do not do much deep frying at home, here are a few things you will want to consider. First, you do need a lot of oil for deep frying. Don't try to deep fry in a small pot to try to save oil. The key is to have enough oil so that your chicken is fully submerged and the oil temperature will not drop too much when you put your chicken in. If you use a small pot of oil, what will invariably happen is that the oil temperature will drop drastically and you will end up with chicken that is drenched in oil when served. When you are deep frying, the water in the batter is essentially boiling off which is why you get plenty of bubbles. The movement of bubbles from the batter to the oil prevents the oil from seeping into the chicken.
With the Cze Char method, start with very hot oil (180°C - 190°C) for the first phase of cooking. After about one minute the temperature of the oil will need to drop to around 160°C so that the inside of the chicken will cook properly by the time the crust is golden brown. If you keep the temperature too high, the crust will brown too quickly while the inside is still raw. What I do is to heat the oil to 180°C, then drop the chicken in. The temperature will gradually drop to 160°C as the heat from the hot oil is transferred to the chicken. I adjust accordingly with a thermometer. As a rough guide, your oil bubbles should look like the top photo when you put the chicken in, then as it cooks, the bubbles will decrease as the temperature of the oil stabilizes to around 160°C . Just make sure it doesn't fall to below 140°C or your chicken will be oily.
A second way of doing this is to double fry the chicken. I have not tried this myself but essentially, you want to fry the chicken at 130°C to cook the inside first. Then allow it to cool and then deep fry a second time at 190°C. This is supposed to give you a nice crust which will stay crisp for a longer time. It is the same principle as frying potato chips where the starch is cooked first then cooled to allowed to harden (a process called retrogradation) before crisping it with a second fry. You can use this method to deep fry a whole batch of wings first, allow them to cool and then put it into the freezer. Then whenever you want to serve the wings, just bring them out and quickly deep fry them at 190°C.
Ok now that you have the basic principles, here is the recipe:
1 kg chicken mid wings
3 Tbl Shrimp sauce
2 tsp sugar
2 Tbl Sesame Oil
3 Tbl Chinese Wine,
1 teaspoon white pepper
2 teaspoon MSG (optional, but don't blame me if it doesn't taste like the real deal)
80g Plain Flour
80g Potato Starch
1/4 tsp Bicarb,
1/4 teasoon baking powder
Mix all the ingredients in Part A together till the chicken is evenly coated. Mix all the ingredients in Part B together till you get a smooth batter and add this to the marinated chicken. Mix well and place in a plastic container to marinade for 8 hours or up to 2 days.
Heat oil to 180°C and drop a few wings into the batter. After about half a minute, use a pair of chopsticks to separate the wings so they don't stick together. After about 1 minute, the oil temperature should have dropped to 160°C if not lower the heat. Cook for 4 mins or until golden brown. Serve with a squeeze of calamansi and sweet chilli sauce (optional).
Thanks for Chef Roy Loi of 12 Stones noodle house for helping me with the recipe. Roy's mom was the first to introduce Har Cheong Gai to Singaporeans in the 1970's when she came up with the recipe and served it at Loy Sum Juan restaurant in Outram Park. This is a modified version of the original recipe for the home cook.