First, preheat the microwave oven (350 degrees Fahrenheit). You will need a jumbo muffin pan for making mini pineapple upside-down cakes. Spray the pan with cooking spray.
Put the cooking pot on the heat, and melt butter. After the butter melts, add sugar and keep stirring. This stirring will take up to three minutes. In the muffin pan, add 2 tbsp of the prepared brown sugar and butter mixture.
In each greased pan, add 1 pineapple ring and then one cherry in the middle.
Take a bowl, add yellow cake mix and all other ingredients mentioned on the package. Don’t add water ⅓ cup of reserved juice. Mix them well.
Pour it in the muffin cups and bake it (30 min). Take the pan out once baking is done and put it aside for 10 min.
With the help of a butter knife, release the cakes from the muffin pan. On the cooling rack, upside-down the muffin pan and then flip both on a baking sheet to avoid wasting any drippings.
Wait for some time and then cakes will be on the sheet after you lift the pan.