Ingredients For the cookies: 250g Biscoff biscuits 145g plain flour 25g cornflour ½tsp bicarbonate of soda ¼tsp baking powder ½tsp salt 190g softened unsalted butter 90g granulated sugar 30g icing sugar 1 large egg, room temperature For the icing: 60g softened unsalted butter 60g Biscoff spread 180g icing sugar 1tbsp milk Lotus biscuit crumbs for topping