Make the edges of the frosting thicker than the centre, so there’s a dip in the middle. Add a large dollop of salted caramel to the dip. Sandwich the second cake layer on top and spread more frosting ...

All three flavours come heavily recommended by Amazon customers. The Salted Caramel has 4.6 out of 5 stars from over 2,000 reviews, with one customer saying: “The sweet and savoury notes dance ...