Beat the room-temperature butter for about five minutes, then gradually add the sugar with vanilla sugar and beat again.
Add two eggs and continue beating, then add the smooth pureed cottage cheese and beat again.
Sift in the flour with salt and baking powder and mix.
Finally add the lemon essence and steamed raisins and mix - the batter is ready.
Spread the batter in a rectangular pan and bake in a well-preheated 170 °C oven for 60-70 minutes; a skewer should come out dry.
Let the cake cool completely before serving.