Preheat the oven to 200°c
Cream the butter and sugar
Add the eggs, mix well.
Add the flour & baking soda, mix again
Add the milk & vanilla extract, blend until combined & smooth
In a separate bowl, mix the cinnamon & brown sugar, set aside
Line a Loaf pan, pour in half the cake batter, scatter apple chunks on top, then sprinkle half the cinnamon sugar mix. Pour the remaining cake batter on top, scatter more apple chunks on top, sprinkle with the remaining Cinnamon sugar mix.
Bake in the oven for 35 minutes.