How to cook
Prepare butter cream with the butter, powdered sugar and egg yolks. In a platter, in alternating order, place cookies, layer of cream, sprinkle with walnuts, then cookies again, layer of sweet briar and so on, until you run out of products.
Top with some of the cream and cover with the ready prepared frosting. Garnish with nuts or raisins.
Allow the cake to stand for 2-3 hours in the refrigerator.