Can I use golden caster sugar instead of white caster sugar in Nigella's Brownies recipe and all of your other recipes?
Golden caster sugar is a superfine sugar made from unrefined sugar cane (or sugar beets). It is a free-flowing crystallized sugar, so is different to light brown sugar, and the crystals are small and fine, so it is also different from demerara or turbinado sugar. It has a slight honey flavour to it, which many people like. This sugar is easy to find in the UK but more difficut elsewhere.
It is absolutely fine to use the sugar as a substitute for regular caster sugar in Nigella's Brownies (from HOW TO BE A DOMESTIC GODDESS. However if the recipe specifies a soft brown or muscovado sugar then don't use golden caster sugar instead, as the resulting brownies may be slightly dry. It should also be fine to use golden caster sugar in place of caster sugar for most other recipes. If you use golden caster sugar in meringues then they will take on a slightly darker colour. For most people this is fine but if you need a snowy white meringue then it would be better to use regular caster sugar.