The following recipe is from Nigella Lawson's book How to be a domestic goddess, one of my favourite baking recipe books!
- 2 large egg whites
- A pinch of salt
- 225 gr caster sugar
- Zest of one lemon
- Half a teaspoon of vanilla extract
- 1 teaspoon of almond essence
- 300 gr of ready ground almonds
- Icing sugar for dusting
Whisk the egg whites and the salt until stiff, with the aid of an electric beater. Then gradually whisk in the sugar until you have a glossy, thick mixture.
Add the lemon zest, vanilla extract, almond essence and ground almonds, then mix to a hard paste.
Line a couple of baking trays with baking parchment. Dust your hand lightly with icing sugar, then shape the paste into small diamonds.
Cover with cling film, then leave to dry in the fridge overnight. The following morning, heat the oven at 140°C and bake each batch for 30 minutes, or until slightly cracked on top. Leave them to cool, the dust with icing sugar and serve.