- 6 egg whites
- 1 teaspoon vinegar
- 1 teaspoon vanilla
- 1½ cups castor sugar
- 1½ tablespoon cornflour
- Whisk egg whites until stiff, add half the sugar and whisk until dissolved. Fold in the rest of the sugar, vinegar, vanilla and cornflour.
- Line the tray with foil and place mixture in centre of foil, smooth around with palette knife.
- If using a gas oven, before starting to beat, mix, turn temperature up to the highest and when ready place tray into oven, turn down to the lowest point cook for about 1½ hours. Check if firm to touch, turn oven off and leave to cool in the oven gradually.