use 18 cm / 7-inch pan, removable bottom • unsalted butter, room temperature • powdered maple sugar • (1 oz, 2 Tbsp) beaten egg, room temperature • cake flour or all-purpose flour • vanilla oil, optional • unsalted butter, room temperature • ground almonds • granulated sugar • beaten egg, room temperature • (2 and 1/3 tsp) cake flour or all-purpose flour • egg yolks, around 40g (1.4 oz) •