Start by preparing the cake batter. Take a large mixing bowl and add the granulated sugar and the vanilla sugar. Crack the eggs into the bowl. Using a whisk or an electric mixer, beat the eggs together with the sugar until the mixture becomes light, smooth, and slightly fluffy. This step is important because it helps incorporate air into the batter, which will make the cake softer.
In a separate bowl, combine the flour and the baking powder. Mix them well so that the baking powder is evenly distributed throughout the flour. Gradually add this dry mixture to the egg and sugar mixture. Add it in small portions while continuously stirring or mixing. This helps prevent lumps from forming and ensures a smooth batter.
Once the flour mixture has been fully incorporated, slowly pour in the melted butter. Make sure the butter is not too hot; it should be slightly cooled so it does not cook the eggs. Stir the batter until the butter is fully blended and the mixture becomes smooth and uniform.
Next, prepare the apples. Wash them thoroughly, peel off the skin, and remove the cores. Cut the apples into small cubes or thin slices, depending on your preference. Smaller pieces will distribute more evenly throughout the cake, while slices will create a more layered texture.
Lightly grease a baking dish or baking sheet with butter or oil to prevent sticking. Spread the diced apples evenly across the bottom of the prepared baking dish. If you like a slightly sweeter or spiced flavor, you can sprinkle the apples with a little sugar or a pinch of cinnamon at this stage.
Pour the prepared batter over the apples. Use a spatula or the back of a spoon to gently spread the batter so that it covers the apples evenly and forms a smooth surface.
Preheat the oven before baking. Set the oven to about 180°C (350°F). Once the oven has reached the correct temperature, place the baking dish inside and bake the cake for approximately 30 to 45 minutes. The baking time may vary slightly depending on the oven and the size of the baking dish.
To check if the cake is fully baked, insert a toothpick or a thin knife into the center of the cake. If it comes out clean or with only a few dry crumbs attached, the cake is done. If the toothpick comes out with wet batter, allow the cake to bake for a few more minutes and test again.
Once the cake is baked, remove it from the oven and allow it to cool slightly in the pan. When it has cooled enough to handle, lightly sprinkle powdered sugar over the top. This adds a delicate sweetness and gives the cake a classic finished appearance.
Serving Suggestions
This apple cake can be served warm or at room temperature. It pairs well with a cup of tea or coffee and can also be served with a scoop of vanilla ice cream or a dollop of whipped cream for a richer dessert.
The cake keeps well for a day or two if stored in an airtight container. If you prefer, you can gently warm individual slices before serving to bring out the buttery aroma and the softness of the apples.