Pineapple upside down cake 😍

Read more- 1/4 cup unsalted butter - 1/4 teaspoon fine sea salt - 1 cup light brown sugar packed - 20 ounces pineapple slices (12 slices) , juices reserved - 28 maraschino cherries without stems - 1 vanilla cake mix sifted - 1 cup pineapple juice (fill the rest with water if reserved juices don’t equa