Ingredients
Method
- Mix together the flour, cocoa and baking powder in a bowl.
- Whip the eggs with the salt into a fluffy foam, add the sugar and whip again.
- Pour in the milk and vegetable oil, and whip until smooth.
- Pour the milk mixture into the dry mixture and whip again.
- Add the baking soda and pour in a cup of boiling water, whip until you have a smooth, runny batter - the batter is ready.
- Grease the slow cooker bowl with vegetable oil and pour in the batter. Bake on the "Baking" setting for 45 minutes, then run the setting again for another 45 minutes - two cycles in total.
- Let the finished sponge cake cool before using it in a cake. Enjoy!

Notes
For the oven: divide the batter into two parts and bake at 160-180°C for 40-45 minutes.
