Preheat your oven to 350°F (175°C).
Grease and flour a bundt pan.
In a large bowl, cream together the softened butter and sugar until light and fluffy.
Add the eggs one at a time, mixing well after each addition.
Stir in the vanilla extract.
In another bowl, combine the flour, baking powder, cinnamon, and salt.
Gradually add the dry ingredients to the wet mixture, alternating with milk.
Fold in the chopped apples until evenly distributed.
Pour the batter into the prepared bundt pan.
Bake for 50-60 minutes or until a toothpick inserted comes out clean.