Combine the butter, Tate & Lyle Fairtrade Pure Cane Light Brown Soft Sugar, flour, eggs, lemon zest, juice and milk together in a bowl. Beat together with an electric hand mixer for about 1 minute until soft and creamy.
Divide the mixture between the paper cases and bake on the middle shelf of the oven for 20-25 minutes until well risen, golden brown and they spring back when lightly pressed with a finger. Transfer the cupcakes to a wire rack to cool.
For the buttercream, beat the butter with an electric hand mixer until really soft, then sift over the Tate & Lyle Cane Icing Sugar and mix again. Add the lemon juice and beat until smooth.
Spread the buttercream over the cupcakes with a small palette knife, decorate with the citrus peel and serve. Alternatively, transfer the buttercream to the piping bag and nozzle and pipe a decorative swirl on top of the cupcakes, decorate with the citrus peel and serve.
Chef's Tip
If you want to add another texture to your lemon buttercream, add a little lemon zest and only half of the lemon juice.