Sweet and Salty Peanut Biscuits

If greed alone were the spur and measure, these would be my favourite biscuits. There’s something about the contrast between salt and sweet and their crumbly lightness that makes them instantly addictive. They make a seductive partnership with vanilla ice cream: you can do this the elegant grown-up way with bowls of ice cream and a plate of the biscuits; or, my weakness, made up into sandwiches, the nubbly discs clasped round the soft, cold cream.

Two requests: don’t use jumbo peanu