Apple Crumble Cake

Prepare the apple filling. Peel, core, and thinly slice the apples.

Place the apples in a saucepan, add 30 g of butter, 30 g of brown sugar, and 1 tsp of cinnamon.

Cook over medium heat for 10 minutes until tender and the liquid evaporates. Remove from heat and let cool.

Make the crumble. In a small bowl, combine 100 g of flour and 50 g of brown sugar.

Add 60 g of room-temperature butter and rub everything between your fingers into fine crumbs.

Prepare the batter. In a large bowl, beat the eggs and 120 g of brown sugar until pale and fluffy.

Add the sour cream, vegetable oil, 1 tsp of cinnamon, and a pinch of salt, then mix well.

Fold in the baking powder and 160 g of flour, mixing until a smooth batter forms.

Pour the batter into a baking pan lined with parchment paper. Carefully arrange the apples in an even layer on top, then sprinkle with the crumble.