- In a bowl, add eggs and sugar. Beat on high speed until it turns light and fluffy. 
- Pour in milk, oil and vanilla. Mix 
- Add flour and baking powder. Gently fold until everything gets combined. 
- Transfer 1/4th of the batter into another bowl and add cocoa powder and 1 tbsp milk into it. Mix. 
- Grease sandwich maker tray with butter. Pour a tbsp of white batter onto the plate. Then add half a tsp of cocoa batter on top, followed by half tsp of white batter until you add 6 layers. 
- Close the sandwich maker and cook for 5-6 minutes. 
- Delicious cakes are ready.