In a blender jar, take banana, egg, brown sugar, ghee, milk and vanilla.
Run until it forms a smooth batter.
Add flour and baking soda and pulse again until it forms a thick batter.
Pour it into mug or small ramekins filling 2/3rd of them.
MW at medium high for 1 minute.
Top the cakes with choco chips and again MW for another one minute.
While serving add some sauce and more choco chips on top. Serve it warm.