Make the simple syrup: In a saucepan over medium heat, combine water, sugar, and almond extract. Bring to a boil, then reduce heat and simmer for 10 minutes. Transfer to a bowl and let it cool to room temperature to thicken.
Prepare the almond filling: In a bowl, mix almond flour, sugar, salt, butter, vanilla extract, almond extract, eggs, and heavy cream until light and fluffy.
Preheat your oven to 350°F.
Place slices of brioche on a baking tray lined with parchment paper.
Brush each slice of brioche with the simple syrup.
Spread a generous layer of almond paste on each brioche slice. Sprinkle with sliced almonds.
Bake in the oven for 15 to 20 minutes until the edges turn golden brown.
Let them cool for 5 to 10 minutes, then dust with powdered sugar before serving warm.
Indulge in the deliciousness of homemade Bostock!