
step 1 Preheat the oven to fan 180C/conventional 200C/gas 6.
Generously butter six non-stick friand or muffin tins.
Melt the butter and set aside to cool.
step 2 Sift the icing sugar and flour into a bowl.
Add the almonds and mix everything between your fingers.
step 3 Whisk the egg whites in another bowl until they form a light, floppy foam.
Make a well in the centre of the dry ingredients, tip in the egg whites and lemon rind, then lightly stir in the butter to form a soft batter.
step 4 Divide the batter among the tins, a large serving spoon is perfect for this job.
Sprinkle a handful of blueberries over each cake and bake for 15-20 minutes until just firm to the touch and golden brown.
step 5 Cool in the tins for 5 minutes, then turn out and cool on a wire rack.
To serve, dust lightly with icing sugar.

Unsalted Butter
100g

Icing Sugar
125g

Flour
25g

Almonds
85g

Egg White
3

Unwaxed Lemon
1

Blackberries
85g