Preheat the oven at 180° C. Dry roast sesame seeds for 2-3 minutes.
Transfer half the sesame seeds into a mixer jar, cool completely and grind into a coarse powder.
Whisk together butter and sugar in a bowl. Add vanilla essence and egg yolks and whisk into a smooth batter.
Add the ground sesame seeds powder and maida and knead into dough.Refrigerate the dough for 15-20 minutes.
Remove the dough from the refrigerator, divide into small portions and shape into small biscuits.
Coat the biscuits with the remaining sesame seeds.
Place a silicon mat on a baking dish and arrange the biscuits on it.
Bake in a preheated oven for 20-25 minutes.
Transfer into a serving plate and serve.