Cheese cake muffins with berries "Sister to love"

Some of us are lucky and have siblings. These are very special people, we love them and they break our nerve (or vice versa). When love overcomes all other feelings that are inevitable after, maybe, tens of years of being confined in one place, we want to treat them. This was my motivation for these very tenderly sweet muffins. (original receipt is from here, but it's in Russian and I felt like modifying it a little bit).

So, what you need is:
100 g of biscuit cookies (grind in very small pieces) If you don't have a blender it will take some time to do it by hand, just take something that will help you to destroy the unity of a cookie!
50 g of melted butter (margarine does as good)
300 g of Speisequark (if you live in Germany) or just Almette cheese (if you are fan of Ricotta or Filadelfia they will also do, but this one is cheaper). In Russia you just need to take творог.
60 mg of cream (~30%)
1 egg - just an egg!
0.5 cup of sugar powder (we want things to be tender, right?)
100 g of fresh or frozen cranberries or any other sour berries. I took a mixture of frozen forest berries.
~200 g of white chocolate - half of it you break into small pieces and another half will be our icing.

First you mix what used to be cookies with butter - the substance will appear crumbly, that's ok. This will be a base of our muffins, so distribute the mixture among your muffin forms and press it there with fingers so it would densely cover the bottom. Layer of 5-7 mm thick is ok. Put it into the fridge for ~20 min - meantime prepare the rest of the stuff.
So, blend quark, egg, sugar powder and cream together adding each ingredient one by one. If you don't have blender it's ok to just mix it with a spoon. Start warming up the oven to 150C. Add berries and grinded chocolate. If your berries were the frozen ones first defrost them. Don't discard the juice that they yield upon warming up - you can use to color the icing!
So, when the base is cool just put the blessed mixture on top and bake it for 30 min at 150C. When ready cover each muffin with melted chocolate (I mixed with berry juice). Let them rest in the fridge for 3 hours and enjoy!!! (on the picture - the last survivor)