Preheat the oven to 180°C/356° F. Line a cake pan (~10x20cm/~4x8 inches ) with parchment paper.
Peel the apples and cut into 1 cm cubes. Mix with the brown sugar and cinnamon.
In another bowl, mix the butter and sugar, then add the vanilla essence and eggs one at a time, stirring constantly!
Add the flour (mixed with baking powder and baking soda) in two or three batches, then the yogurt. Homogenize.
Pour half of the mixture into the cake pan, then evenly distribute one half of the apples. Pour in the second half of the mixture, then the rest of the apples and level.
Bake for 60-70 minutes. After the first 45 minutes, cover the apple bread with parchment paper to prevent it from burning.
Allow the cake to cool in the pan for 15 minutes, then transfer it to a cooling rack and let it cool completely!