1. Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper

2. In a medium bowl, whisk together the potato flour, cocoa powder, and baking powder, then set aside

3. In a large bowl, whisk the granulated sugar and eggs until light and fluffy before adding the softened butter and mixing until fully combined

4. Gently fold the flour mixture into the egg mixture until just combined

5. Using a spoon or cookie scoop, place small balls of dough onto the prepared baking sheet, spacing them about 1 inch (2.5 cm) apart

6. Bake for 12 to 15 minutes, or until a toothpick inserted into the center comes out clean, then let cool completely on a wire rack

7. For the filling, mix confectioner's sugar, vanilla sugar, and softened butter in a bowl until smooth and creamy

8. Add the egg yolk to the filling and whisk until fully incorporated

9. Using a small spoon or piping bag, place a dollop of filling on top of each cooled cake bite

10. Gently press a roasted salted almond into the filling on each cake bite

11. If desired, drizzle with a double shot of espresso just before serving for an extra touch of flavor

12. Enjoy your delectable Caramel-Filled Chocolate Cake Bites with Salted Almonds!