Chef John's Pineapple Upside-Down Cake  | 
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                                            Prep Time: 15 Minutes Cook Time: 45 Minutes  | 
                                            Ready In: 60 Minutes Servings: 1  | 
                                         
                                        
                                     
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                    This iconic American dessert looks like a simple, rustic fruit cobbler when it comes out of the oven, all browned and bubbling, but a few minutes later, when it's turned over and that gloriously caramelized surface is revealed, it becomes so much more. Ingredients: 
                    
                        
                                                1/4 cup butter  |  
                                                3/4 cup light brown sugar  |  
                                                1 tablespoon pineapple juice  |  
                                                1 tablespoon dark rum (optional)  |  
                                                1/2 small fresh pineapple - peeled, cored, and sliced  |  
                                                1/2 cup butter  |  
                                                1 1/2 cups all-purpose flour  |  
                                                1/8 teaspoon ground cardamom  |  
                                                1/2 teaspoon salt  |  
                                                2 teaspoons baking powder  |  
                                                1/2 cup white sugar  |  
                                                1 egg  |  
                                                1/2 cup cold milk  |  
                                                
                     
                    Directions: 
                    
                        
                            
                                1. Preheat the oven to 400 degrees F (200 degrees C). 2. Melt 1/4 cup butter in a 12-inch cast iron skillet over medium-low heat. Stir in brown sugar, pineapple juice, and dark rum. Cook over medium-low heat until sugar is dissolved and mixture is bubbling, about 5 minutes. 3. Remove from heat and spread pineapple slices in a layer over the brown sugar mixture, completely covering the mixture. Set skillet aside. 4. Melt 1/2 cup butter in small skillet over low heat until the butter begins to brown and release a nutty fragrance, about 5 minutes. Watch carefully, butter burns easily. Remove from heat and let cool for 10 minutes. 5. Whisk together flour, cardamom, salt, baking powder, and white sugar in a large bowl. Whisk in egg and cold milk until just combined. Pour in melted butter and stir to mix thoroughly. 6. Pour batter over the pineapple slices in the skillet; spread evenly to cover. 7. Bake in preheated oven until the cake begins to bubble around the edges, the top is browned, and a toothpick inserted into the center comes out clean, about 30 to 35 minutes. Let cool in the skillet for 10 minutes. 8. Loosen the cake from the skillet by running a knife around the inside edge of the cake. Invert a large plate over the top of the skillet and flip over, releasing the cake to show the pineapple slices on top.                              | 
                         
                         
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