In a bowl break the butter and sugar until fluffy white cream. Add eggs one at a time, after each was stirred with a mixer. Add condensed milk, vanilla sugar and liquid vanilla and mix again. Sieve the flour with the baking powder and add to the butter mixture. Mix well. Divide the dough into two parts and one stained with red liquid paint. In court, which will bake the cake pour first half of the white dough and smoothed. Sprinkle thickly with cocoa powder. Now it is up to half of the dough red - poured and smoothed. Again sprinkle a thin layer of cocoa. Repeat the above procedure after the red layer is not sprinkled with cocoa. The cake is baked in a preheated oven to 180C degrees for about 65 minutes or until a wooden skewer stuck it out dry. * Roasting and preheating according to its own oven.