Peel your potatoes and roughly cut them into chunks about an inch in size.
Put into a large saucepan and cover with plenty of cold water.
Put the pan on a medium heat and let it come to a boil. Cook gently for 30 minutes or until a blunt knife can go through the potato chunks without resistance.
Drain the potatoes then return them to the saucepan. Add the butter and mash well.
Pour in the truffle oil and some salt and pepper, and continue to mash. You want it to be really smooth. Taste and adjust the seasoning if needed. Enjoy!