Cook sweet potatoes by boiling, steaming or roasting them until very soft and tender
Discard any skins, and add to a food processor along with all other ingredients
Whizz until completely smooth. Taste and adjust ingredients as necessary - add more maple syrup for sweetness, more salt for saltiness, more cocoa powder for chocolate flavour etc
Leave to cool before using as a cake frosting
Keeps for up to a few days in the fridge
Video
Notes
*Coconut oil can be omitted for an oil-free version.