Simple Caramelised Sugar Colour

Ingredients

• 50 g sugar (rock sugar, caster sugar, or soft brown sugar)
• 100 ml oil
• 500 ml boiling water

Method

Heat the wok dry on medium-high heat for two minutes. You need the vessel hot and seasoned before the oil touches it — this prevents sticking and ensures even temperature distribution across the base. Pour in the 100 ml of oil and let it warm for 30 seconds until a light shimmer appears across the surface. Add your sugar — crushed if using rock sugar, whole if using caster or soft brown — and stir constantly with a wooden spoon or silicone spatula. Do not leave it. The sugar will clump slightly as it begins to melt, then gradually dissolve into a clear amber liquid. This is caramelisation: the sugar molecules break down and recombine into new compounds that give colour, bitterness, and depth. Watch for the transition from clear to pale golden (around 160°C), then to light tea-brown (170°C), then to mahogany or soy-red (180°C). Small, tight bubbles will rise through the liquid — these indicate heat-control is working. The reaction accelerates rapidly once colour develops, so reduce heat to medium-low at the tea-brown stage to prevent overshooting into burnt, acrid territory.

When the caramel reaches a deep reddish-brown with dense small bubbles — this takes roughly four to six minutes depending on heat intensity and sugar type — you have two paths. The standard route: immediately pour 400 ml of boiling water into the wok in a steady stream whilst stirring. The water will hiss violently and create steam; keep stirring for another 30 seconds as the mixture amalgamates into a smooth, glossy sauce. This is your caramelised colour, ready to use. The advanced route demands confidence with aromatic-infusion. At that same date-red stage, whilst the sugar is still at peak temperature, add your prepared aromatics — bruised spring onion pieces, ginger slices, whole garlic cloves, Sichuan pepper, or star anise — and stir-fry hard for five to ten seconds. The heat will crack the aromatics' cell walls and release their oils into the fat. Immediately pour the boiling water in with the same vigour as before. The infused version is darker in colour and carries a savoury, layered character that plain caramelised colour cannot match.

Strain through a fine sieve if you used whole aromatics and want a clear condiment. If flecks remain, that's acceptable — chinese-cuisine often embraces visible flavour. Use whilst warm or allow to cool and store in an airtight jar for up to two weeks. Reheat gently before use if the oil has solidified.