01 - Preheat oven to 350°F. Grease an 8-inch round cake pan and line bottom with parchment paper.
02 - Whisk together flour, almond flour, baking powder, and salt in a medium bowl.
03 - Beat softened butter and sugar 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 in two additions, alternating with milk. Mix until just incorporated, being careful not to overmix.
06 - Transfer batter to prepared pan and level surface. Distribute sliced almonds evenly across top.
07 - Bake 30-35 minutes until golden brown and toothpick inserted into center emerges clean.
08 - Let rest in pan 10 minutes, then remove to wire rack to cool completely. Dust with powdered sugar if desired.