About this recipe:This is a popular French cake that celebrates the holiday of Epiphany (January 6th) the day when the 3 Kings visited the Baby Jesus. As part of French tradition, a bean or small china feve (favour) is hidden in the cake. The person who finds the feve in his or her slice becomes king or queen for the day. The person can also choose someone to be their king or queen and can lead the traditional dance.
Place the almond paste into a food processor or blender with about half of the sugar, and process until well blended. Add the butter and remaining sugar using and process until smooth, then blend in 1 egg, vanilla extract, almond extract, flour and salt. Set aside.
Preheat the oven to 220 degrees C (425 degrees F). Butter a baking tray or line with parchment paper, and set aside.
Roll out one sheet of the puff pastry into an 28cm square. Keep the pastry cool, do not knead or stretch. Use a large pie plate, cake tin or frying pan to trace an 228cm (11 inch) circle onto the dough using the tip of a small knife. Place the circle of pastry onto the prepared baking tray. Repeat with the second sheet of pastry. Refrigerate both sheets.
Mound the almond filling onto the center of the pastry that is on the baking tray. Leave about a 4cm margin at the edges. Press the bean or feve down into the filling. Place the second sheet of pastry on top, and press down the edges to seal. Beat the remaining egg with a fork, and lightly brush onto the top of the gallette. Use a knife to make a criss cross pattern in the egg wash, and then prick several small slits in the top to vent steam while baking.
Bake for 15 minutes in the preheated oven. Do not open the oven until the time is up, as the pastry will not fully puff. Remove from the oven, and dust with icing sugar. Return to the oven, and cook for an additional 12 to 15 minutes, or until the top is a deep golden brown. Transfer to a wire rack to cool.
Lay a golden paper crown gently on top of the cake. This will be used to crown the person who finds the bean or feve. Serve warm or cold. Make sure to tell everyone about the bean or feve.