Mix maida, corn flour and custard powder, keep aside.
Soft butter, add sugar to it and cream well.
Then add curd, vanilla essence and beat well until creamy.
Then add custard powder mixture to the butter sugar mixture and make it to soft dough. If your dough is sticky add little maida to make it a soft pliable dough.
Roll the dough on a flat surface using chapathi roller for about 5mm thickness.
Then cut out shapes using cookie cutter. Collect the remaining dough and repeat the process.
Preheat oven to 180 deg C for 10mins.
Meanwhile make a small dent in the middle of all the biscuits using a small round lid and apply a very thin layer of jam in it.
Arrange it in a baking tray with aluminum foil lined.
Bake it for 12-15mins at 180 deg C.
Allow it to cool and store Jam Biscuits in airtight container. Enjoy Jam Biscuits!