Preheat the oven to 200 degrees. Line a tray with baking paper. With a sharp knife, cut the pastry into 16 even squares (divide in half, divide each half in half again, and then the other way around). Cut the Snickers bar into 8 even pieces (it helps to refrigerate it first – and use a very sharp knife). Place a single piece of chocolate on a piece of puff pastry, use the milk to moisten around the chocolate and place another square of pastry on top. Using a fork seal the edges the whole way around. Repeat with remaining pastry pieces and chocolate.
Bake for 10 – 12 minutes or until pastry is golden and puffed up. Dust with icing sugar and serve with vanilla ice-cream. Serves 4 (2 puff’s each).