2 cups all-purpose flour
1 cup packed light-brown sugar, divided
1 teaspoon baking powder
2 teaspoons cinnamon, divided
1/2 pound (2 sticks) unsalted butter, at room temperature
3 large eggs
1 cup milk
2 pounds tart apples, such as Granny Smith
2 tablespoons fresh lemon juice
Sweetened Whipped Cream for serving
Preheat oven to 350 degrees. Coat a 9-inch springform pan with cooking spray. Cut a circle of parchment paper to fit on the bottom of the pan. Spray again.
Peel apples, cut into thin slices and place in a bowl. Toss apple slices with 1 teaspoon cinnamon, ½ cup brown sugar, and lemon juice, and put them in the prepared pan, pressing down gently as you pack them in the pan.
In the large bowl of an electric mixer, mix flour, baking powder, butter, ½ cup brown sugar, eggs, milk, and 1 teaspoon cinnamon just until the batter is smooth. Pour the mixture over the apples in the prepared pan.
Put the pan on an aluminum foil-lined baking sheet, and bake for 1 hour, or until golden brown on top and a cake tester inserted in the center of the cake comes out clean. Run a knife around the edge of the pan, and let the cake cool in the pan to set. Remove the pan rim and turn the cake over on a serving plate (apples will be on top).
Serve with sweetened whipped cream.