Recipe video above. This is a recipe for truly crispy Potato Rosti that's beautifully golden on the outside and fluffy on the inside. The secret is pan frying in the right fat! Butter = tasty but not crispy. Oil = crispy but flavourless. The Swiss cracked the code - use clarified butter (or ghee!). Buy it or make your own (it's super easy).And if you want ultra ultra crispy, make small thin ones instead - they are literally potato crisp crispy!This recipe would probably serve 6 normal people, but in my family it serves 4. Makes 1 giant rosti about 2cm / 4/5" thick, or 10 - 12 small rostis.