How to make madeleine cookies step by step

• Sift the flour with cocoa and baking powder through a sieve.
  50 g wheat flour - all-purpose, 1 tablespoon bitter cocoa, 0.5 teaspoon baking powder
  
• Beat the egg with sugar until very fluffy and light.
  1 egg, 50 g sugar
  
• Add the sifted flour and butter and mix gently.
  50 g butter
  
• Lightly grease the cookie mold with oil.
• If you want to make your work easier, you can transfer the dough to a piping bag - it will be easier to apply.
  
• Spoon the dough into the mold.
  
• Place a small teaspoon of Nutella in the center of each cookie - if using, and cover it with a small amount of dough.
  approx 50 g Nutella
  
• Put the mold with the cookies in the refrigerator for an hour.
• After this time, bake the cookies in an oven preheated to 170 degrees (convection) or 180 degrees (top/bottom mode) for about 12-15 minutes - until a dry skewer comes out clean.
• After baking, remove the cookies from the mold and cool them.
• To make the glaze, break the chocolate and melt it in a double boiler (read my notes above the recipe if you don't know how to do this) and mix with oil.
  approx 100 g chocolate, 1 teaspoon oil
• Dip the cookies in chocolate and place them on a wire rack or baking paper and sprinkle with chopped nuts - if using.
  nuts