Pre-heat your oven to 140C Fan/160C/325F/Gas Mark 3, and line a cupcake tin with cupcake cases
For the cupcake sponge, mix together the baking spread and caster sugar, ideally using an electric hand mixer or in a stand mixer with the paddle attachment, for 5 minutes until smooth and fluffy
Add the eggs and orange extract, and mix them in well
Then gently whisk, or fold in, the self raising flour
Divide the mixture between the cupcake cases, and bake them for 25-30 minutes or until a thin skewer inserted in the centre of the cupcakes comes out clean. Put them on a rack to cool completely
For the buttercream, start by melting the white chocolate. I prefer to do this in a microwave. Start with a 30 second blast, then stir, then do 10 second blasts, stirring between each one, until it is fully melted. Or you can melt it in a glass bowl over a pan of simmering water
Mix the softened butter on it's own for a few minutes. Then add the icing sugar, orange extract and milk, and mix until smooth. Finally, mix in the melted white chocolate. You can do this by hand, but an electric hand whisk or stand mixer with paddle attachment will provide the best results. If the buttercream is too stiff, you can add a little more milk
Spread or pipe the buttercream on top of the cupcakes
Decorate with the Terry's White Chocolate Orange segments and orange sprinkles
Store in an airtight container in a cool place and eat within 3 days