Roast the chicken skin

• Spread the chicken skin on a baking tray in a single layer
• Roast until deeply golden and crisp

Crisp the skin further

• Transfer the skin to a frying pan and cook until fully crisp and rendered

Blend the butter

• Put the softened butter and the crisp chicken skin in a food processor
• Blend until smooth and evenly combined

Season and store

• Mix in the salt and black pepper
• Shape into a log or pack into a jar and chill until firm