01 - Preheat oven to 350°F. Grease and line an 8-inch round cake pan with parchment paper.
02 - Whisk together flour, almond flour, baking powder, and salt in medium bowl. Set aside.
03 - Beat butter and sugar in large bowl until light and fluffy, approximately 2-3 minutes.
04 - Incorporate eggs one at a time, mixing thoroughly after each addition. Blend in almond and vanilla extracts.
05 - Add dry ingredients to wet mixture in two additions, alternating with milk. Mix until just combined, avoiding overmixing.
06 - Transfer batter to prepared pan, level surface, and distribute sliced almonds evenly over top.
07 - Bake for 30-35 minutes until toothpick inserted in center comes out clean and top is golden brown.
08 - Let cool in pan for 10 minutes, then remove to wire rack. Dust with powdered sugar before serving if desired.