Pre heat your oven to 190 degrees celcius
Place the margarine into a bowl and beat it until softened. Then add the sugar, flour, salt, eggs, essence and orange juice and rinds, and whisk until the mixture is smooth.
Use a spoon, to divide the mixture between all the paper cases.
Place the muffin tin in the oven and bake for 15 minutes, then swap over the position of the tins over and bake for a further 3-7 minutes, until both trays of cupcakes are a light golden colour.
Remove the tins from the oven. Leave the cupcakes to cool in the tins for a few minutes. Then transfer them to a wire rack to cool.
