Preheat oven to 350 degree
grease a 9-inch round cake pan.
mix together brown sugar and melted butter in a small bowl and spread on the bottom of the cake pan.
Arrange the slices of along the bottom of the pan
Add cherries to the center of pineapple
Combine flour, baking powder, and the salt in a medium-sized mixing bowl.
In another medium-sized mixing bowl with a hand mixer, combine the softened butter and sugars and beat until incorporated.
Add egg, sour cream, milk, and pineapple juice and beat until combined. Add in the flour mixture. gently mix in coconut.
Spread evenly on top of pineapple and cherries.
Bake for 30-35 minutes or until golden brown and toothpick inserted comes out clean.