Can be adjusted with Earl Grey, lemon (plain), or protein flavors
Preheat the oven to 180°C (356°F).
In a bowl, combine the eggs and sugar and mix well.
Add melted butter and milk, and mix thoroughly.
Sift and add protein powder, cake flour, and baking powder, then mix until evenly combined.
Fill the madeleine molds about 80% full with the batter.
Bake in the oven at 180°C (356°F) for 12-15 minutes.
Cool on a wire rack.