Following my attempt at making firm tofu using nigari as a coagulant, I picked up some Glucono-Delta Lactone (GDL) coagulant at Phoon Huat and decided to give this dessert-style tofu pudding (a.k.a. 豆花 douhua/tau huay/ tau foo fah) a go. GDL is thought to be a more healthy coagulant compared to inorganic calcium compounds.
Unlike moulded tofu, silken tofu doesn’t require any special container and produces a greater volume of tofu in relation to the amount of soya milk used. Typically, it takes less than an hour to be ready for serving.
William Shurtleff’s Book of Tofu says that
[GDL is] an organic acid that solidifies soymilk in much the same was that lactic acid or a yoghurt starter is used to curdle dairy milk. A newly discovered solidifier made from natural gluconic acid, lactone makes it possible for the first time to solidify very thin soymilk, and even cold soymilk, by simply heating it to somewhat below the boiling point.
Following the recipe in Shurtleff’s Book of Tofu:
1 tsp lactone, dissolved in 2 Tbs water
3 1/4 cups soya bean milk
1 Tbs matcha green tea powder
3 Tbs sugar or honey
1) First, I began by making soya bean milk and measured out 3 1/4 cups whilst it was still hot.
2) Mixed in 1 Tbs green tea matcha powder and 3 Tbs sugar. As matcha often clumps up, it helps to sift it into the milk and use a whisk to make sure it is thoroughly incorporated.
3) Dissolved the 1 tsp lactone in 2 Tbs of water.
4) Poured the lactone solution into the soya bean milk, whilst gently stirring.
5) I made individual portions by dividing the still liquid soya bean milk into 6 custard cups. You can also leave the tofu to set inside a single pot. There is no separation of curds and whey, unlike the other method of making firm tofu.
6) The Book of Tofu says to let the soya milk stand uncovered for half an hour while it cools and sets, then cover with cling film and refrigerate. I made the mistake of covering the custard cups with cling film right away, and ended up with condensation on the inside.
Verdict: compared to commercially prepared tofu, mine definitely tasted like an amateur’s attempt. The texture, while very light and soft, could have been smoother. There was also a faint sour taste The green tea flavour was quite subtle, and the amount of sugar was just nice – I wonder what it would have tasted like without any sugar at all?
Anyhow, this is definitely worth another try. The Book of Tofu says that nigari makes the most delicate and delicious silken tofu, so I may use that alternative the next time.