1 grapefruit, zest only
1 grapefruit
1 grapefruit, zest grated and half the juice
75²µ/2½´Ç³ú caster sugar, plus extra for coating
200g/7oz caster sugar
75²µ/2½´Ç³ú caster sugar
25g/1oz ground almonds
50²µ/1¾´Ç³ú icing sugar, sifted
210²µ/7½´Ç³ú self-raising flour
80g/3oz sugar
80g/3oz unsalted butter
200g/7oz double cream
3 large free-range eggs
4 large free-range eggs
100²µ/3½´Ç³ú mascarpone
125ml/4fl oz grapefruit juice (around 2½ grapefruits)
75ml/2½fl oz grapefruit juice (around 1½ grapefruits)