Preheat the oven to 200°C/Fan 180°C/Gas mark 6.
Place the Fate Low Protein Chocolate Flavour Cake Mix into a mixing bowl. Add the margarine and ProZero Chocolate flavour.
Using a whisk, mix well for 1 minute, then stir in the Vitabite and Tesco Free From White Chocolate Buttons.
Pour the mixture into the lined cake tin.
Bake for 20-25 minutes until risen.
Remove from the oven and leave to cool for 5-10 minutes.