To a mixing bowl : add butter,powdered sugar to it.Using electric beater, whisk well until soft and creamy.
Add an egg to it.
Give a quick mix.Add the flour.
Mix well, bring together to form a dough.Keep the dough on the parchment paper.Fold the parchment paper such that you roll over on the parchment paper and the dough is in between.This is to avoid sticking.Roll over and flatten it using a chapati roller, use your favorite cookie cutter to cut shapes.
Collect the scraps and roll over again, repeat to finish off the entire dough.Lay parchment paper on a baking tray, arrange the cookies carefully.Preheat oven at 180 deg C for 10 mins.Bake in preheated oven for at least 12-15 mins or until the edges start to change to golden.
Cool down then store in an airtight container.