Pre-heat oven to 180C. Grease a 20cm round cake pan.
Using an electric mixer, beat butter and sugar until light and fluffy. Add eggs and vanilla and mix until combined.
Sift together flour, baking powder, salt, cinnamon and nutmeg. Add to the butter mixture with the milk and mix on low until combined.
Pour into prepared pan, and place slices of apple on the surface. Brush with a little maple syrup. Bake for 45-50 minutes or until cooked through.