Universal Cake

• 3/4 cup flour
• 2 egg
• 1/2 cup butter
• 1/2 cup sugar
• 1 teaspoon baking powder
• 1/2 cup yogurt
• 1/2 teaspoon(s) salt 

1. Mix egg yolks with sugrar, add melted butter, yogurt, flour, and baking powder.
2. Whip egg whites with salt. Add to the batter.
3. Grease a baking form, add berries to the bottom, pour batter and bake 30-40min at 180C/350F.
4. Cool.