Start by setting oven to 375F.
Lightly grease and flour your madeleine pan.
In a food processor, blend package of Biscoff Cookies into crumbs. Set aside
Beat eggs and sugar together until thick.
Beat in vanilla and salt.
Sift flour, Biscoff Cookie crumbs,cinnamon, and baking powder into bowl and fold together until mixed.
Stream in melted butter while mixing on low.
Spoon a tablespoon of batter into each cavity.
Bake for 12-14 minutes or until lightly golden brown. Be careful to not over bake.
Allow to cool for a few minutes before removing.
Make sure pan has cooled before baking the next batch.