Creating the perfect Pineapple Upside-Down Cake can be a rewarding endeavor if you follow these clear steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Prepare Pan: Melt the butter and pour it into a 9-inch round cake pan. Sprinkle brown sugar evenly over the melted butter.
3. Arrange Pineapples: Place pineapple slices on top of the brown sugar mixture, arranging them in a pattern you like. Place a cherry in the center of each pineapple slice if using.
4. Mix Dry Ingredients: In a bowl, whisk together flour, baking powder, baking soda, and salt until well combined.
5. Cream Butter and Sugar: In another bowl, cream the granulated sugar and remaining butter until light yellow and fluffy.
6. Add Eggs and Vanilla: Beat in the eggs, one at a time, followed by the vanilla extract.
7. Combine Mixtures: Gradually add the dry mixture to the wet mixture, alternating with milk, starting and ending with the dry ingredients. Mix until just combined.
8. Pour Batter: Carefully spread the batter over the arranged pineapple and cherries in the cake pan.
9. Bake: Place the cake in the oven and bake for 35-40 minutes, or until a toothpick inserted in the center comes out clean.
10. Cool: Remove the cake from the oven and let it cool in the pan for about 10-15 minutes.
11. Flip the Cake: After cooling, carefully invert the cake onto a serving plate, gently lifting the pan away.

By following these steps, you will create an incredible Pineapple Upside-Down Cake that will impress everyone!