Cake flour 100g
Baking powder 2g
3. Heat the butter over water until melted, then set aside. 4. Crack the eggs into a bowl, add fine granulated sugar directly, and stir evenly (no need to whip). 5. Add a drop of vanilla extract to the lemon zest (optional if unavailable), then pour the mixture into the egg batter and stir well. 6. Add the melted butter and stir until combined. 7. Sift in the cake flour and baking powder, then stir until smooth. 8. Stir the batter until it flows like silk, cover with plastic wrap, and refrigerate for 1 hour to rest. 9. Remove from the refrigerator and transfer to a piping bag. 10. Pipe the batter into molds until 90% full, then bake in the middle rack of an oven preheated to 190°C for 13-15 minutes. 11. Bake until the center puffs up and the edges are golden brown, then remove from the molds and serve.


