Step-1In a bowl take flour, cocoa powder 15g, egg, melted butter 5g, baking powder, baking soda, vanilla essence, milk 8 ml, sweetener and pinch of salt. Mix all the ingredients with spatula.
Step-2Take a microwave safe bowl grease it with butter, pour the mixture little less than half and put in microwave for 1 n half to 2 minutes. Take it out and let it cool down.
Step-3In a microwave safe bowl take remaining ingredients, add sweetener and mix them together and pop it into microwave for 30 seconds and your chocolate sauce is ready.
Step-4Once cake has cool down pour the chocolate sauce from top.