Put margarine, sugar, vanilla sugar and eggs in a bowl and mix well with a hand mixer. Add low-fat quark, flour mixed with baking powder and lemon juice and stir well. Put everything in a greased springform pan.
Bake in the preheated oven at 170 ° C top / bottom heat on the middle rack for about 60 minutes. Make a chopstick test.
If the cake gets too dark, please cover with aluminum foil in good time.