Cream together the butter and sugar until fluffy. Slowly add the whole eggs and egg yolks while scraping down the bowl frequently. Stir together the salt, baking powder, and flour. Add the dry ingredients and mix until just combined.
Chill dough slightly then roll out to desired thickness (between 3 and 5mm is recommended).
Once dough is sheeted chill in the refrigerator until firm then cut out desired shape.
Freeze cookies and once frozen bake in a 340°F rack oven for 8-12 minutes depending on the size of the cookie. The cookie should have very slight color.
Seal with cocoa butter.
Soak gelatin leaves in ice cold water.
Prepare 2nd trimoline in a mixing bowl with a whisk.
Boil water, 1st trimoline and sugar to 230°F and pour all in mixing bowl.
Add pre-soaked gelatin leaves, Classic Flavor and whip up to an aerated & pipe-able texture.