How to make almond cake with plums and crumble

• Cream the soft butter with sugar until fluffy.
  100 g butter, 150 g sugar
• Mix the flour with baking powder and ground almonds.
  150 g wheat flour - all-purpose, 50 g ground almonds, 2 teaspoons baking powder
• Beat in one egg at a time into the butter mixture, add a tablespoon of flour and mix on low speed.
  2 eggs
• Add approximately half of the remaining flour and natural yogurt, mix briefly.
  160 ml natural yogurt
• Pour in the rest of the flour and mix briefly - just until combined.
• Grease the springform pan with butter and sprinkle with breadcrumbs or flour.
• Spread the batter and level the surface.
• Wash the plums, cut them in half and remove the pits.
  approx 400 g plums
• Arrange the plums on the cake.
• Sprinkle them with crumble (briefly mix the ingredients together with your fingers) and almond flakes.
  4 tablespoons flour, 3 tablespoons sugar, 2 tablespoons butter, 1 handful almond flakes
• Bake at 180 degrees Celsius (top-bottom mode) for approximately 45 minutes - until a dry stick comes out clean.
• After baking, cool.