Prepare the Cookie Dough:
Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper or a silicone mat.
In a mixing bowl, cream together the softened butter and granulated sugar until light and fluffy.
Beat in the egg and vanilla extract until well combined.
In a separate bowl, whisk together the flour, baking powder, and salt. Gradually add the dry ingredients to the wet ingredients, mixing until a soft dough forms.
Prepare the Topping:
In a small bowl, combine the melted butter and brown sugar. Mix until smooth.
Spoon about 1 teaspoon of the brown sugar mixture onto the prepared baking sheet, spreading it slightly to form a base for each cookie.
Assemble the Cookies:
Place a small piece of pineapple (or pineapple tidbits) on top of the brown sugar mixture.
Add a maraschino cherry half in the center of the pineapple.
Scoop about 1 1/2 tablespoons of cookie dough and gently flatten it with your hands. Place the flattened dough over the pineapple and brown sugar, pressing lightly to cover.
Bake:
Bake in the preheated oven for 12-15 minutes, or until the cookies are golden around the edges.
Remove from the oven and let the cookies cool on the baking sheet for 5 minutes before carefully transferring them to a wire rack to cool completely.
Serve:
Once cooled, serve your Pineapple Upside-Down Cookies as a fun and delicious dessert or snack!