Mix icing sugar and flour. Add orange juice and melted butter and mix well. Combine together with uncooked almond flakes and refrigerate in a container for at least 1 hour. Spread thin layer on the silicone mat or baking paper into a desired shape. Bake in the oven at 160 degrees until golden brown. Give it shape you like before cooled. Store in air tight container ideally with silica gel.