Try this Palmier Cookies recipe, or contribute your own.
Rolling laminated dough without chilling the butter first causes the fat to melt into the layers, destroying the distinct flakiness required for French pastries. Maintaining a cold environment ensures the butter remains solid until the pastry hits the oven heat. Chill the double-rolled log for exactly 30 minutes before slicing to keep the dough firm enough for clean cuts. Using a very sharp knife prevents the layers from compressing together during slicing, which preserves the characteristic heart shape.
Baking these pastries requires an aggressive oven temperature of 425 degrees to rapidly vaporize water trapped in the dough layers. This thermal shock forces the puff pastry to rise quickly before the butter leaks out completely. Flip the rounds at the 7-minute mark to ensure even caramelization on both sides without burning the high concentration of cane sugar. Space each piece two inches apart on the parchment-lined baking sheet to accommodate lateral expansion during the initial heat phase.
Adjusting this recipe for larger crowds is straightforward because the sugar-to-pastry ratio remains constant per sheet of puff pastry. Doubling the batch simply requires working with one sheet at a time while keeping the backup dough refrigerated until ready for buttering.