This Simple Plum Torte Is a Baker’s Secret Weapon—Here’s How to Master It

Ingredients

• 1 cup all-purpose flour
• 1 teaspoon baking powder
• A pinch of salt (about 1/4 teaspoon)
• 1/2 cup (1 stick) unsalted butter, softened to room temperature
• 1 cup granulated sugar, divided
• 2 large eggs, at room temperature
• About 12 small Italian prune plums (or roughly 1 pound of your favorite plums), halved and pitted
• 1 tablespoon lemon juice
• 1 teaspoon cinnamon, for the topping