I have made some changes.
Ingredients : 1 cup whole wheat flour,1/2 tsp baking powder,1/2 tsp baking soda ,a pinch of salt,1/4 tsp cardamom powder.
3/4 cup mango puree ( I used Dussehari mango ),1/4 cup curd malai,1/4 cup oil,1/2 cup jaggery sugar ( this is dark brownish black sugar from jaggery -it is unrefined & available at Rajkamal Tea centre,Chembur).I use this sugar as it is healthy . Ordinary sugar can be used.My cake has got a dark colour due to this jaggery sugar.
Method : Mix all dry ingredients together - the flour,baking powder,soda & cardamom.
Mix mnago puree,curd malai ( or curd ),oil & sugar.Jaggery sugar is lumpy & if mixed in dry mix does not mix properly.Hence ,I mix jaggery sugar in liquid ingredients.
Make a well in the dry mix & pour the liquid mix.Mix nicely till no lumps remain.One can add water or curds or chaas to get drop down consistency batter.Curd,chaas should not be sour to avoid sour taste.
Line a baking dish with butter paper.Pour the batter onto the butter paper in the dish.Bake in microwave for 7-8 minutes.Leave for 5-10 minutes.Remove from microwave & insert a knife to check if it comes out clean.If knife is clean ,cake is done.Otherwise,bake for 1-2 minutes more.Leave it for 5-10 minutes.