To make the wings, melt the white chocolate in a heatproof bowl over a pan of simmering water. Divide into three smaller bowls and add the same gel colours as before. Cut 8cm squares of baking parchment and, using a pen, draw a pair of butterfly wings on each square so that the design shows through on the other side or, if you prefer, trace the design below. Turn the paper over and, using the line as a guide, paint on the melted chocolate. Sprinkle crushed biscuits on the edges to create patterns, then leave to set. Once set, gently push the wings into the cupcakes at a 45-degree angle.
Healthy chocolate brownies
Heat the oven to 190C/170C fan/gas 5 and line a shallow 23cm square baking tin with baking parchment. Tip the beans, cocoa, coffee granules, xylitol, vanilla, eggs and yogurt into a large bowl. Blitz using a hand blender until smooth. Or, do this in a food processor. Add the baking powder, then blitz again.
