Ruined it by adding too much meringue ㅠ
Peel and boil the sweet potato, then mash it.
Sift cocoa powder and mix it into the mashed sweet potato.
Beat the eggs, add sugar and salt, and mix well.
Sift in the flour and baking powder, then add to the batter.
Add melted butter and milk, then mix to complete the madeleine batter.
Fill the madeleine pan with batter, smooth the tops, and bake in a preheated oven at 180°C for 12-15 minutes.