- Whisk the softened butter and the sugar in a mixing bowl till creamy 
- Add the eggs one by one to mix till smooth 
- Lightly mix together the dry ingredients: salt, flour, baking powder, and gradually add to the mixing bowl, preferably half first, blend, then the other half, mix till the batter is smooth. 
- While the batter is resting, peel the apples (or leave the skin on, up to you) and slice them. 
- Heat the oven to 350 F or 180 C 
- Grease a 9" springform mold, and line the bottom with baking paper.Pour the batter into the mold, and smooth the top evenly 
- Display the apples slices on top of the batter 
- Sprinkle the brown sugar mixed with the cinnamon over the apples and batter 
- Bake the cake at the lower shelf of the oven for 40 minutes until the top is golden. To check if the inside is done, insert a small knife or wooden stick into the cake, if it comes out clean, the cake is baked through.