Lemon

Butter (milk), sugar, eggs, milk, plain flour (wheat), lemon zest, lemon juice, salt, baking powder,

 

Swiss meringue buttercream: egg whites, butter (milk), sugar, lemon juice,

 

Lemon curd (sugar, egg, lemon juice (sulphites), butter (milk), water, gelling agent (agar), salt, lemon oil).