Preheat the oven to 180┬░C. Grease a 20.5cm loose-bottomed cake tin and line the base with baking paper.
In a mixing bowl, add all the ingredients together, mix well until all combined. The mixture will be very wet, don’t worry it is meant to be.
Pour the mixture into the cake tin. Bake for about 40 minutes, check with a skewer, leave in the oven if it needs more time.
Once cooked, remove from the oven. Leave to cool in the tin for about 15 minutes, then turn out onto a cooling rack.
For the frosting, add the Diet Coke and chocolate into a saucepan and heat up gentle until the chocolate has melted and the mixture is all combined.
Remove from mixture from the heat and stir in the milk. set.
Spoon the chocolate mixture over the top of the cake, allow to cool and serve.
I have played around with this recipe a couple of times now and this is the version that I am happy with. Remember depending if you want a full cake or you want to make cupcakes, this recipe is perfect for both. If you have tried this Slimming World Diet Coke Chocolate Cake, let me know your thoughts, if you have changed the recipe, what did you do and how it turn out?