French Apple Cake

Bahan-bahan (8 porsi)

• 1 cup all-purpose flour, (spooned into measuring cup and leveled off)
• 1 teaspoon baking powder
• ¼ teaspoon salt
• ½ cup (1 stick) unsalted butter, (at room temperature)
• ⅔ cup granulated sugar, (plus more for sprinkling over cake)
• 2 large eggs
• 1 teaspoon vanilla extract
• 3 tablespoons dark rum
• 2 medium baking apples, (peeled, cored and cut into ½-inch cubes (about 2½ cups; see note))
• Confectioners' sugar (optional), (for decorating cake)