1. Preheat oven to 180 C. Line 3 baking trays with non stick baking paper.

2. Use an electric beater to beat the butter and sugar in a bowl until pale and creamy.

3. Add the condensed milk and flour to the butter mixture. Stir to combine. Stir in the crasins and chocolate.

4. Divide the dough into 2 equal portions. Roll tablespoonfuls of 1 portion into balls. Divide among the prepared trays, allowing room for spreading. Use the palm of your hand to flatter slightly. Bake in oven, swapping trays halfway through cooking, for 8-10 min or until light golden. Set aside on the trays for 3 min to cool before transferring to a wire rack to cool completely.

5. Repeat with remaining dough portion.