The Mary Berry Citron Tart is a lemon-flavored tart featuring a sweet shortcrust pastry base filled with a rich lemon custard. The filling is made with fresh lemon juice, zest, eggs, sugar, and cream, and baked until just set and slightly wobbly in the center. It’s a delightful balance of tangy and sweet, with a creamy texture that contrasts beautifully with the crisp pastry shell.
Plain flour – 175g (1¼ cups)
Cold unsalted butter – 100g (cubed)
Icing sugar – 25g (2 tablespoons)
Egg yolk – 1
Cold water – 2–3 tablespoons
Caster sugar – 150g (¾ cup)
Double cream – 150ml (scant ⅔ cup)
Lemon zest – from 2 lemons
Fresh lemon juice – 120ml (about 2–3 lemons)
Mix flour and butter: Rub the butter into the flour using your fingertips until it resembles breadcrumbs.
Add sugar and egg yolk: Mix in icing sugar, then egg yolk and cold water until a soft dough forms.
Chill dough: Wrap in cling film and refrigerate for 20–30 minutes.
Preheat oven to 200°C (180°C fan) or 400°F.
Roll out the pastry on a lightly floured surface to about 3mm thick.
Line the tart tin and press gently into the edges. Trim excess.
Chill again for 10 minutes to prevent shrinkage.
Blind bake: Line with parchment, fill with baking beans, and bake for 12 minutes.
Remove beans and bake for another 5–7 minutes until lightly golden. Cool slightly.
Whisk eggs and sugar in a bowl until smooth.
Add cream, lemon zest, and juice: Whisk gently until combined.
Strain through a sieve to ensure a silky finish.
Reduce oven to 160°C (140°C fan) or 320°F.
Pour filling into warm pastry case.
Bake for 25–30 minutes or until just set with a slight wobble in the center.
Let the tart cool completely in the tin.
Chill in the fridge for at least 1 hour before serving.
Dust with icing sugar or decorate with berries if desired.