Preheat your oven to 350°F (175°C).
Melt the butter in a round cake pan over low heat.
Sprinkle the brown sugar evenly over the melted butter.
Arrange pineapple slices on top of the brown sugar.
Place a cherry in the center of each pineapple slice.
In a bowl, mix flour, baking powder, and salt.
In another bowl, cream granulated sugar and remaining butter.
Beat in eggs and vanilla extract until smooth.
Add flour mixture and milk alternately, stirring until just combined.
Pour the batter over the pineapple arrangement in the pan.
Bake for 40 minutes or until a toothpick comes out clean.
Let cool for 10 minutes, then invert onto a serving plate.