How to make cinnamon apple cake step by step

Step 1 - preparations

• Take out the eggs, buttermilk, and butter from the fridge in advance to let them warm up.
  3 eggs, 80 ml buttermilk, 170 g butter
• Grease the baking pan with butter and sprinkle with breadcrumbs or flour.
• Preheat the oven to 180 degrees Celsius (top/bottom heat) or 170 degrees Celsius (fan-assisted).

Step 2 - prepare the apples

• Peel the apples and cut them in half, then into quarters.
  approx 300 g apples
• Remove the core.
• Cut the apples in half again - to get eighths, and cut them into larger pieces - cubes.
• Add cinnamon to the apples - if you like a strong cinnamon flavor, use 2 teaspoons - and nutmeg - mix thoroughly.
  1-2 teaspoons cinnamon, 1/4 teaspoon nutmeg
  

Step 3 - Prepare the Creamed Cinnamon Dough

• Sift the flour through a sieve together with baking powder, add cinnamon and mix.
  200 g wheat flour - all-purpose, 1 teaspoon baking powder, 0.5 teaspoons cinnamon
  
• Beat the butter with powdered sugar for several minutes on high speed with a mixer - until you get fluffy, light, and thick butter.
  170 g butter, 150 g powdered sugar
  
• Add to the butter one egg at a time and a tablespoon of the mixed flour.
  3 eggs
  
• Mix briefly after each addition on low speed with a mixer - just until combined.
• Add about half of the remaining flour and mix briefly on low speed.
  
• Pour in the buttermilk and mix briefly.
  80 ml buttermilk
  
• Add the rest of the flour and mix briefly - stop when you still see remnants of flour and briefly mix them in with a spoon.
  
• Transfer about 2/3 of the dough into the pan and spread it in an even layer.
  
• Add the apples in cinnamon and spread them evenly.
  
• Spread the rest of the dough over the apples.
  

Step 4 - Prepare the Crumble

• Transfer the crumble ingredients to a bowl and quickly combine them with a fork or your fingers.
  75 g wheat flour, 70 g butter, 45 g sugar, 0.5 teaspoon cinnamon, 1/4 teaspoon nutmeg
  
• Sprinkle the crumble over the top of the cake.
  

Step 5 - Bake the Cake

• Place the cake in the preheated oven and bake for about an hour - until a toothpick comes out clean.
• After baking, let the cake cool slightly.