EASY PLUM UPSIDE-DOWN CAKE

Steps:

• Preheat oven to 350 degrees. Place 4 tablespoons butter in an 8-inch square cake pan. Heat in oven until butter melts, about 4 minutes. Remove from oven; sprinkle brown sugar evenly over butter. Arrange the plum slices like rooftop shingles. Start at one end of the pan, then stagger and overlap the slices so the bottom of the pan is covered.
• In a large bowl, cream remaining 8 tablespoons butter with sugar and lemon zest. Add eggs, one at a time, beating until combined after each.
• In a medium bowl, whisk together cake flour, baking powder, salt, and allspice. Add flour mixture to butter mixture in 3 batches, alternating with the milk and starting and ending with the flour.
• Pour batter into cake pan, and spread evenly over plums. Bake until a toothpick inserted in center of cake comes out clean, about 50 minutes. Let cool 10 minutes, then invert cake onto wire rack to cool again slightly before serving.