Preheat the oven to 180 ° C. Melt butter in the microwave or in a saucepan over low heat. Book. Sift the flour with the baking powder in a bowl. Break the eggs by separating the whites of yellow. Mount the egg whites firm with salt. In a bowl, mix with whisk the butter with the sugar, vanilla sugar and then add the yellow egg and pour in rain the flour-yeast mixture. Mix well. Then add white whisked, turning gently in the same sense. Divide dough into 2 equal parts: in one fold the pistachio paste and dye green, in the other, the cocoa. Mix well the two fragrances separately. Put preparations in a cake Pan lined with paper baking, (or buttered and floured) alternating until the dough. Bake for 30 to 35 minutes. The cake is cooked when pressed the tip a knife, it must bring out dry. Otherwise continue cooking. Let cool. * * * Steps for the chocolate ganache: crush the chocolate in a bowl. Bring the cream to a boil, then pour it on the chocolate stirring gently with a wooden spoon until getting with a ganache smooth and homogeneous. Spread generously on the chocolate ganache cake and sprinkled with pistachios. concasees