This three-layer pineapple upside-down cake is a decadent twist on the classic, featuring caramelized pineapple rings and cherries baked into each moist layer. It’s filled and frosted with rich brown butter buttercream, adding a deep, nutty flavor that complements the sweetness of the pineapple. Topped with a generous sprinkling of chopped pecans, the cake offers a delightful mix of buttery, fruity, and crunchy textures, making it a showstopping dessert.