Preheat oven to 350 degrees F

Melt 3 tbsp of butter in cast iron and add brown sugar. Mix. Allow to simmer for about 5 minutes. Add pineapple slices, covering the bottom of the pan. Place cherries in centers of pineapples and open spaces if desired. Remove from heat.

Dry ingredients: Mix flour, baking powder and salt in separate bowl.

Prepare cake batter. Cream softened butter and sugar together. Add vanilla. Mix

Add egg yolks one at a time and mix until smooth.

Beat egg whites until stiff peaks form.

Alternate adding pineapple juice and dry ingredients to batter while mixing.

Fold in egg whites gently

Pour batter into cast iron pan

Bake for 30-35 minutes until center is set and toothpick inserted in cake come out clean

Invert cake onto serving dish and serve