Today I want to show you how to prepare a traditional Cantonese dessert which is called red bean soup 红豆沙.
Red bean soup is in the category of Cantonese desserts called tong sui (糖水), literally means sugar water. It is a popular item on the menu of most Chinese dessert houses in Hong Kong, Malaysia, and Singapore. The red bean soup is also regularly included in the Chinese banquet package as the concluding dish to wrap up a meal.
What may surprise you is how simple are the ingredients required, only three ingredients: red beans, dried tangerine peel, and rock sugar.
I am keeping this recipe simple, although you can switch it up by incorporating some optional ingredients to the basic recipe, which I will explain this further in the following sections.
I will focus on how to prepare the Cantonese way, which requires each bean are burst open and disintegrate to form a concentrated suspension.
Let’s get into the details.
Step 1. Freeze the red beans
Here are the steps:
In this recipe, I’m using 300 g of red beans, and three pieces (about 5g) of preserved tangerine peels.
For the red beans
- Rinse the red beans with water at least twice to remove the impurities and dirt.
- Transfer the red beans into a freezer-safe container, and add sufficient water just enough to submerge all the red beans. This method is not considered traditional but is incredibly useful, as it can reduce the cooking time substantially to achieve a homogenous texture. I am using this method to cook the Chinese porridge in another recipe on this blog. You can follow this link to get the recipe.
- Let the red beans soaked in the water for a few hours so that they are adequately hydrated. Three to four hours are sufficient, but overnight is even better.
- Transfer the soaked red beans to the freezer and freeze it overnight. The water that penetrates into the red beans will transform into ice. Since the volume of ice is about 10% larger than water, the pressure exerted by the ice within the beans will change the structure of the red beans, which causes them to disintegrate much faster while boiling.
For the dried tangerine peels
Dried tangerine peels are a standard ingredient for the Cantonese Style red bean soup. The amount to use depends on the quality of the dried tangerine peels. For the three to four years old peels, the color is lighter, and the flavor is less. For those which has been kept for more than ten years, the color is darker, and the taste is more intense. In this recipe, I am using three pieces 15 years old medium-sized dried tangerine peels, weighted about 5g.
- Soak the dry tangerine peels in water for fifteen minutes or until it is fully hydrated.
- Scrape off the pith (the inner side of the peels), which contains some bitter substance with a metal spoon.
- Cut the tangerine peels into small pieces so that the peels will disintegrate completely during boiling.
Step 2. Simmer the red beans over medium heat
I suggest using a large pot with a thick bottom to cook the red bean soup. First, the soup can spill off from the pot easily, and by using a large pot will keep the kitchen clean. Secondly, the beans can burn quickly during cooking. You can avoid this from happening by using a large pot with a thick bottom and with high heat capacity, which can keep the soup at a constant boil with minimum heat.
- Transfer the block of frozen red beans into a pot. Heat it over low heat and wait until the ice is fully dissolved.
- After the red bean block is fully melted, add the tangerine peels and water. Cover and continue boiling over medium heat for an hour.
Pandan leaves are a pleasant addition to enhance the flavor of the red bean soup. In Malaysia, we use pandan leaves to flavor a variety of desserts, much like vanilla in the Western countries. I normally used three to four pieces of pandan leaves for 300g of red beans. It is optional, just like the use of vanilla in western desserts., Therefore, the quantity is entirely up to you.
After 1 hour, the color of the soup has changed to maroon, which indicates the red beans have started to disintegrate. The beans now look soft and broken down.
3. Mashed the red beans
There are a few ways you can proceed from this point.
- The first method is to use an immersion blender to blend the beans until there are broken up.
- The second method is to fish out the beans and mashed them manually and subsequently returned to the pot.
- The third method is not to do it manually but put the beans into a food processor to speed up the work.
Either way will achieve the same purpose. However, if you use a food processor or blender, be careful not to over-process the red beans until pasty. I’m not making red bean paste. I’m looking for a red bean soup with which you will still expect to find some whole beans.
Since I’m doing manually, I need to remove the panda leave first, then let it pass through a wire mesh strainer. Mash about 80% of the beans, and keep the other 20% intact, so that there are still some whole beans in the soup.
4. Sweeten with rock sugar
- Now I return the manually mashed or machine processed red beans to the pot.
- Add the rock sugar plus a little bit of salt to balance the sweetness. It is a common practice to add sugar at this stage. It is a strange phenomenon that the red beans will take a longer time to soften if you add the sugar at the earlier. Sweetness is a personal preference, so you can adjust according to your desire.
- At this point, the red beans should have disintegrated further to form a homogeneous suspension and thicken considerably.
- After adding the sugar and salt, do not cover the pot anymore as you need to stir it constantly to avoid it from burning. Simmer over low heat for a further 30 minutes.
- Now it comes to the final step. Turn off the heat and put on the lid. Let it sit for 30 minutes to allow the red beans to disintegrate further. (If you want it thicker.)
Rock sugar is crystallized cane sugar. The taste is slightly milder and fruitier than the ordinary white sugar. It is widely used to prepare Chinese desserts and cuisines that involves stewing and braising. You can substitute it with any sugar since the difference is minimal.
What texture is considered the best for red bean soup?
Red bean soup from different regions and countries have different texture and consistency. However, according to the Cantonese style red bean soup, the red beans should have disintegrated to the point that the texture of the soup is homogeneous and slightly ‘sandy.’ (The ‘sand’ is referred to the disintegrated red beans.) That’s why in Cantonese, it is called 红豆沙 which translates in verbatim as ‘red bean sand.’
I have just explained in detail how to prepare the basic traditional Cantonese style red bean soup. Nevertheless, if you think that the basic recipe is too simple, you can switch it up by adding a few optional ingredients.
Pandan leaves and coconut milk
Add a few pieces of pandan leaves to the soup while boiling. Pandan leaves, also called screw pine leaves, are readily available in tropical countries such as Malaysia and Thailand. It contributes a unique aroma to the red bean soup.
Besides that, you can also swirl a tablespoon of coconut milk on top of a bowl of red bean soup before serving. It adds flavor to the red bean soup and doubles up as garnish.
Have you ever wondered what those translucent studs suspended in the red bean soup? Those are the chewy and tiny sago pearls.
Sago comes in the form of small white pearls. If you like it, at a tablespoon of the pearls to the red bean soup and boil for twenty minutes. The sago pearls will turn translucent when cooked. The presence of the sago pearls will change the texture of the soup, which looks more like congee. I prefer the original texture of the red bean soup, and therefore I only add two tablespoons of sago into the soup.
Now it is your turn
The simplicity of making the red bean soup means you can prepare it easily at home. I suggest you presoaked and freeze the red bean in advance.
You can serve the red bean soup, either hot, cold, or warm, depending on the weather and your preference.
If you like to serve it cold, please take note that the red bean soup will become thicker if you chill it overnight.
Give it a try and let me know of the outcome by leaving your comment below. It does not take you long before you can enjoy a bowl of heartwarming traditional Cantonese dessert at home.
- 300g (10 oz) red beans
- 3 pieces pandan Leaves
- 3 pieces (about 3-5 grams) of dried tangerine peel (chenpi 陳皮)
- 1500ml (6 cups) of water
- A pinch of Salt
- 150g rock sugar
- 2 tbsp of sago
- Rinse the red beans with water to remove the impurities.
- Soak the red beans overnight. (Optional: keep the red beans in the freezer to speed up the disintegration of the beans.).
- Add the pandan leaves and dried tangerine peels.
- Boil the red beans with water for one hour.
- Separate the beans from the liquid, mash the beans and then return to the pot.
- Add the sago and rock sugar. Add water if necessary.
- Boil for a further twenty minutes. Serve.
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Serving Size:6 servings
Amount Per Serving: Calories: 160 Total Fat: 0g Saturated Fat: 0g Trans Fat: 0g Unsaturated Fat: 0g Cholesterol: 0mg Sodium: 170mg Carbohydrates: 40g Net Carbohydrates: 0g Fiber: 3g Sugar: 33g Sugar Alcohols: 0g Protein: 2g