Preheat oven to 350 degrees.
Lightly grease a muffin tin.
Add melted butter evenly into each muffin well.
Sprinkle brown sugar over the butter.
Place pineapple pieces into each cavity.
Add one maraschino cherry to the center of each pineapple piece.
In a mixing bowl combine flour, baking powder, and salt.
Set aside.
In a separate bowl cream together softened butter and granulated sugar until light and fluffy.
Add eggs one at a time, mixing after each addition.
Add vanilla extract.
Alternate adding the dry ingredients, pineapple juice, and milk.
Mix until smooth.
Do not overmix.
Spoon the batter over the pineapple layer.
Fill each muffin cavity about 3/4 full.
Bake for 20 to 24 minutes until golden brown and a toothpick inserted into the center comes out clean.
Allow the cakes to rest for 5 to 10 minutes.
Run a knife around the edges if needed.
Carefully invert the cakes while still warm.
Allow the topping to settle.
Serve warm or at room temperature.