Divide the frosting into four small bowls and colour it in degrading shades with your preferred food colouring. Transfer into four piping bags fitted with large star nozzle. To finish the cake ...

NB: plus overnight chilling Yields: 10 servings Prep Time: 30 mins Total Time: 30 mins Calories per Serving: 621 butter, melted, plus extra to grease Lotus Biscoff biscuits full-fat cream cheese icing ...