Hello Thomas, baking an apple charlotte is a wonderful and reliable way to use up a large batch of apples, especially with simple pantry staples.
For a standard nine-inch round cake pan or springform pan, the optimal oven temperature is 350 degrees Fahrenheit (175 degrees Celsius). While some recipes suggest 375 degrees, that higher heat often causes the delicate, sugary top crust to brown or crisp too quickly before the dense, fruit-packed center has finished setting. Baking at 350 degrees allows the heat to penetrate the batter gently and evenly.
In terms of timing, you should expect it to bake for 45 to 55 minutes. The slight variation in time depends mostly on the moisture level of your apples and whether you use glass, ceramic, or metal cookware.
Here are a few practical signs to look for so you know when it is perfectly done:
First, check around the 40-minute mark. If the top has reached a rich golden color but the center still wobbles, you can loosely tent a sheet of aluminum foil over the pan to prevent the top from scorching while the inside finishes baking.
Second, test the center by inserting a wooden skewer or toothpick. It should come out clean with no raw batter attached, though you may feel the softness of the cooked fruit.
Third, allow the cake to cool in the pan on a wire rack for about 15 to 20 minutes before serving or slicing. This allows the crumb to stabilize so it will not collapse or tear when sliced.
I hope this guidance helps you achieve a beautifully baked dessert. Enjoy your apples!