Powdered Sugar

Let me tell you about powdered sugar, and why it behaves so differently from the sugar in your bowl.

Ordinary sugar is made of crystals, hard and sharp-edged. Powdered sugar is that same sugar ground down to dust. Grind anything fine enough and it stops acting like grains and starts acting like flour — it dissolves almost instantly, it clings to wet surfaces, it melts into liquid without a trace of grit. That is the whole mechanism, nothing mysterious in it.

Choose it by look and feel, not by brand. It should be white, dry, and fine as flour — no lumps, because lumps mean moisture got in and the crystals began to stick back together. Rub a pinch between your fingers: good powdered sugar feels almost like talc, not like sand.

Some people say you can swap it for regular sugar in any recipe, just use a bit more. No! Regular sugar won't behave the same way in cold butter or a thin glaze — you'll still feel grit on your tongue after beating. That misconception leads straight to grainy buttercream and icing that crunches when it should melt.

Keep it sealed. It pulls moisture from the air faster than you think. 100 grams of it carries 389 kilocalories, almost pure carbohydrate, nothing to balance it out.