Beat eggs and sugar until creamy. Now add vanilla essence + milk + oil and beat more. Add salt.

In another bowl sift flour and baking powder together.

Now fold the flour mix into the egg mixture.

Divide the batter into 2 different bowls. In one mixture add cocoa and mix.

Now grease your sandwich maker and start pouring the batter. (first 1 tbsp of plain batter and then 1 tbsp of cocoa mix in the middle of plain mix. then again 1 tbsp of plain mix. Pour it in the middle of the previous mixture) You can also design the way you want.

Cook it 2 minutes or until toothpick comes out clean. (Note: time may vary according to the type of sandwich crafter you are using)