Moist, rich and delicious. Can be an irresistible nibble or a gorgeous pud with crème fraiche. Makes 24 medium or 18 large squares.

These much-loved biscuits, sometimes called millionaire’s squares, are fiddly to make, so get the maximum flavour for your effort by making them with butter and best-quality chocolate.

THESE much-loved biscuits, sometimes called millionaire’s squares, are fiddly to make, so get the maximum flavour for your effort by making them with butter and best-quality chocolate.