Beat 4 egg whites until stiff, add sugar. Carefully fold in the almonds. Pour into a piping bag with a large perforated spout (metal spout) and squirt onto a baking tray lined with baking paper.
Sprinkle with pine nuts and bake in a preheated oven (electric: 175 °C/ gas: level 2) for approx. 25 minutes. Lightly beat the remaining egg whites and brush the biscuits with them shortly before the end of the baking time.