3/4 cup PLUS 1 or 2 tablespoons sugar
8 tablespoons (1 stick) unsalted butter
1 cup unbleached all-purpose flour, sifted
1 tsp baking powder
3 large plums, pitted and sliced
1 tsp ground cinnamon
1. Arrange a rack in the lower third of the oven. Preheat the oven to 350°F.
2. In an electric mixer, cream the 3/4 cup sugar and butter. Add the flour, baking powder, eggs, and salt and beat to mix well. Butter a 9-inch cake pan. Cut a circle of parchment paper the size of the bottom of the pan, butter it, and place in the pan. Place plums in a circular pattern in the pan. Mix the cinnamon with the remaining 1 or 2 tablespoons of sugar and sprinkle over the top.
3. Bake for 40 to 50 minutes, until the center tests done with a toothpick. Remove and cool to room temperature or serve warm.
Recipe adapted from Epicurious