Ingredients

Steps

• Preheat the oven to 170°C and grease a baking ring mould.
• Cream the butter and sugar in a bowl until pale and creamy.
• Stir in egg yolks, flour, potato flour, lemon zest, and 60ml of milk.
• Add the baking powder and vanilla essence mixture to the batter.
• Whisk egg whites to soft peaks and fold them into the mixture.
• Pour into the mould and bake for 20 minutes until golden.