Place the eggwhite in the bowl of an electric mixer and whisk on high speed until soft peaks form.
Add the sugar, 1 tablespoon at a time, whisking until each addition is dissolved before adding more++.
Once all the sugar has been added, scrape down the sides of the bowl and whisk for a further 10–15 minutes or until the mixture is thick and glossy+++.
Place the cornflour and vinegar in a small bowl and mix until smooth.
Add the cornflour mixture to the eggwhite mixture and whisk for 30 seconds or until well combined. Makes 1 quantity
+ Making meringue is a science. Be sure to measure your ingredients carefully, including the eggwhites as egg sizes do vary. Fresh, room temperature eggs work best – when whisked they’ll become fluffy and voluminous, plus they’re more stable during baking.
++ Be patient when gradually adding the sugar to the eggwhite. Each tablespoon of sugar should be dissolved before the next is added.
+++ Take care not to overwhisk the meringue mixture – it’s ready when it’s thick, glossy, smooth and there are no more sugar granules. You can check this by rubbing a little mixture between your thumb and forefinger.
It’s best to avoid making meringue on humid days. Excess humidity can cause meringue to sink during or after baking.