01 - Heat the oven to 350°F. Grease and line a 9-inch round cake pan with parchment paper.
02 - Whisk together almond flour, all-purpose flour, baking powder, and salt in a large bowl.
03 - In a separate bowl, beat the eggs with granulated sugar until light and slightly thickened, about 2 minutes.
04 - Stir the melted butter, orange juice, orange zest, vanilla extract, and almond extract into the egg mixture until well combined.
05 - Gently fold the wet mixture into the dry ingredients just until combined, taking care not to overmix.
06 - Pour the batter into the prepared pan and smooth the surface with a spatula.
07 - Evenly sprinkle sliced almonds and 2 tablespoons of granulated sugar over the batter.
08 - Bake for 30 to 35 minutes until the top is golden and a toothpick inserted in the center comes out clean.
09 - Allow the cake to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
10 - Dust the cooled cake with powdered sugar before serving, if desired.