Make a smooth, easy flowing batter with rice flour, sugar and milk. Keep it aside for 15 -20 minutes
Make a thick pouring consistency batter with plain flour, rice flour, sooji, sugar and add warm milk as required to make the batter. Keep it aside for 20 minutes
Take out around 1/2 cup batter in a separate bowl, add the food color or cocoa powder for chocolate swirls. Mix it properly.
Now grease a hot griddle or non stick pan with ghee. Pour chocolate batter first, make swirl design or any other design you prefer, but you have to do it super fast. So a squeezy bottle or piping bags will help you here.
Wait for 2 minutes, the chocolate batter will get set. Pour white / plain batter over the pattern and try to cover the swirl design / pattern completely from all sides. Spread it thinly. Again you have to be very fast.
Once it gets cooked evenly from all sides, place the filling in the center, fold it over and take it out of the pan.
Again grease the pan and complete rest of the designer patishaptas like that.
There are many variations to it both in the batter and filling. Some use all purpose flour and sooji too in the batter, but traditionally it is being made with rice flour only. Go and try with the flavours that suits you best. For filling you can use dry fruits too and in place of jaggery can replace it with sugar, but the jaggery gives such a nice aroma and taste that is hard to match !!!