Ingredients:
- 1-1/2 cups all-purpose flour, spooned into measuring cup and leveled-off
- 1-1/2 teaspoons baking powder
- 1 teaspoon cinnamon
- 1/4 teaspoon nutmeg
- 1/8 teaspoon cardamom
- 1/2 teaspoon salt
- 8 tablespoons (1/2 cup) unsalted butter, softened, plus more for greasing the pan
- 1 cup plus 2 tablespoons sugar, divided
- 1 large egg
- 1 teaspoon vanilla extract
- 1/2 cup milk (low fat is fine)
- 1 pound plums, pitted and quartered