Preheat the oven to 350°F (175°C). Grease and flour a baking pan.

In a mixing bowl, whisk together the almond flour, sugar, baking powder, and salt.

In another bowl, beat the eggs, then add melted butter and vanilla extract. Mix well.

Combine the wet ingredients with the dry ingredients and mix until just combined.

Pour the batter into the prepared baking pan and smooth the top.

Sprinkle sliced almonds on top of the batter.

Bake in the preheated oven for 25-30 minutes or until a toothpick inserted in the center comes out clean.

Allow the cake to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.

Dust with powdered sugar before serving.