Ingredients

Cake

• 250 ml thick, homogenized sour cream, 12 or 18%
• 3 eggs
• 100 g butter
• 2 apples
• 2 glasses flour
• 1 1/2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 3/4 glass sugar
• 1 tablespoon vanilla sugar
• 1 teaspoon cinnamon
• a small pinch of salt

Crumb Topping

• 1/3 glass flour
• 1/4 glass sugar
• 1/2 teaspoon cinnamon
• 1/2 teaspoon instant coffee granules
• 40 g butter
• 1 glass walnuts

Preparation

1. Take the sour cream and eggs out of the fridge ahead of time and let them come to room temperature.
2. Melt the butter.
3. Peel the apples and cut into small cubes.
4. Preheat the oven to 180°C. Line a small baking pan with parchment paper.
5. In a bowl, mix the flour with the baking powder, baking soda, sugar, vanilla sugar, cinnamon, and salt.
6. Add the melted butter, sour cream, and the separately beaten eggs, and mix gently. Pour into the pan.
7. Sprinkle with the apples. Knead together the crumb topping ingredients and mix with the chopped walnuts. Scatter over the top of the cake.
8. Place in the oven and bake for about 40 minutes.