In France, on the festival of Epiphany on January 6, it is customary to eat a King cake called Galette des Rois (roi means king, in French). The galette is a puff pastry filled with frangipane. It contains a small hidden object (usually, a small figurine or a bean). Whoever gets the slice with the hidden object is the king or queen for the day, and wears a crown. This is a super fun tradition that kids love!
I used a store-bought puff pastry. The best puff pastry I was able to find in the US is from the Dufour brand (you can find it at Whole Foods). There are other puff pastries that will work fine, such as the Pepperidge Farm puff pastry. Wewalka and Avanti also make good puff pastries.
You will need 2 disks or sheets of puff pastry. The galette des rois is traditionally round. If your puff pastry is rectangular, you can just cut it in a circle, or make a rectangular galette.
The recipe I am using is from famous French chef Cyril Lignac. His recipe is particularly delicious. I converted measurements to cups to make it easier for you to make in the US. Also, instead of using an actual vanilla bean, I used vanilla extract, which is easier.
Please note, there are 2 steps to making the frangipane: first, you make a cream called crème patissière, and then you make an almond paste. The frangipane is the mixture of the crème patissière and the almond paste.