Oven preheated to 180C (fan forced). Butter a Madeleine pan.
Place the butter in a pan over medium low heat and heat until frothy and the colour of nut brown with a hazelnut aroma. Allow to cool slightly.
In a bowl combine the Flour, sugar and baking powder and whisk to combine fully.
In a separate bowl, whisk egg, milk and vanilla bean seeds.
Add the egg mix to the dry mix and whisk until just combined.
Add the Burnt butter and whisk until it has just incorporated.
Spoon batter into a madeleine pan, and bake in oven for 15 minutes.
Once cooked, remove from oven and allow to cool slightly before removing.