In a medium mixing bowl, beat butter, sugar, and eggs together until creamy. Stir in flour, baking powder, and vanilla until well mixed.
Spray your cake pan with olive oil spray. Pour the batter into the bowl Thinly slice apples with a mandolin or paring knife. Either group the apples together (about 1/3 of an apple) and gently press into the cake batter. This results in a soft, slightly firmer apple. Or, fan out the apples around the cake in a single layer for soft, tender apples. Sprinkle the top with 1/3 cup of sugar and cinnamon.
and set it into the air fryer at 320 degrees F for 12-20 minutes.
until it the top is golden in color. Serve warm. If desired, lightly dust with confectioners sugar before serving.
Plate, serve, and enjoy! Notes Note: The exact time will depend on what air fryer you own and how thick your cake pan is. I do not recommend a very thick cake pan, as the center will not cook.
