Beat the eggs with sugar.

Add melted and cooled butter, sour cream and whip. Now add flour and baking powder and all is well again whisk.

In a saucepan multivarki pour half of the batter.

And the other half of the dough mix with cocoa and mix well.

Spread the dark batter into the pan on top of white.

And stick to do the test in the different patterns. Generally, when I have a spare 5 minutes, I divide the batter in different bowls, make the dark dough, and then with a spoon lay out in the form of alternately white and dark batter, then the cake turns out patchy. But today I did not have time to spare, so stick to "Tinker" and all;)))

Put the bowl in the slow cooker, choose the mode "Pastries", set the time to 60 minutes (I couldn't, I had to put 59 minutes), close the lid and all "Start". After baking, open the cover and leave the cake in the bowl for 5 minutes. Then put on a rack and let cool. After complete cooling, you can sprinkle with powdered sugar. My boys the last time something exactly belong to the powder, so I sprinkled did not. If you bake in the oven, then bake in preheated 170 degree oven for 50-60 minutes. Readiness check wooden skewer. If you bake mini-cupcakes, the baking time will decrease for 15 minutes. See for yourself, it all depends on your oven.