Cover the form with a diameter of 27 cm with baking paper, so that the paper does not clump, moisten it in hot water and squeeze, the paper will become obedient, this procedure will not affect the quality of the cake in any way.
RUB the softened butter with half the sugar.
Add the egg yolks.
Mix thoroughly and add sour cream.
Beat the whites to soft peaks, then add the rest of the sugar and beat to tight peaks.
Sift flour and mix with baking powder. Add to the liquid ingredients and stir. If the dough is cool, add a couple of spoons of sour cream or kefir. In several steps, enter the proteins, stirring gently. Wash the berries. I have gooseberries, raspberries, currants and blueberries.
Put half of the dough in the form, spread half of the berries on the dough.
Spread the remaining dough on top.
Spread the rest of the berries on top, leave a little for decoration. Bake the cake in a preheated oven at 180 degrees for about 45 minutes. Then reduce the temperature to 160 degrees and bake until ready.
Mix sour cream with powdered sugar, focus on your taste.
Remove the finished cake from the oven, put a layer of sour cream on top of the hot cake and spread out the remaining berries.
Cool the pie and serve. If you want to hit everyone on the spot at all, sprinkle it with grated chocolate.