Pre-heat the oven to 180 degrees C (350F gas 4) and line a 12 hole cupcake tin with cases
Place the softened butter and caster sugar in a large bowl and use an electric mixer to cream them together until it becomes pale
Add the remaining ingredients and continue to mix thoroughly with the electric mixer for about a minute until smooth
Divide the mixture between the cases filling them ⅔ full with cake mixture (note it makes 9-12 depending on the size of your cases)
Bake in the oven for 15-20 minutes until golden (test they are ready by placing a skewer in the centre, if it comes out clean then you know they are cooked through)
Cool on a wire rack then cut a circle from the top of each cake and cut the circle in half to make "wings", fill the hole with a generous teaspoon of lemon curd, sprinkle over the white chocolate curls or shavings and place the wings on top pointing upright
Recipe by Cook Low FODMAP at https://cooklowfodmap.com/low-fodmap-lemon-and-white-chocolate-butterfly-cakes/