Heat the oven to 400°F (200°C) or gas no. 6. Brush two sheets of 12 madeleine shapes with melted butter, then flour lightly and tap out excess flour. Sift the flour twice on to a plate and set in a warm place. Melt the butter in a saucepan and allow it to cool slightly.
Crack the eggs into a mixing bowl and stir in the sugar and van