This gluten-free recipe for Pineapple Upside-Down Cake is perfect for those with dietary restrictions. The cake is made with a gluten-free flour blend and a topping of melted butter, brown sugar, and pineapple rings. The cake batter is then poured over the top and baked until golden brown. The result is a moist and flavorful cake that is safe for those with gluten sensitivities to enjoy.