Sesame Cookies (Kue kering Wijen)

For us nothing more suitable in our tea/ coffee time but cookies. And this sesame cookies just perfect one for you to try also.  Ingredients:  250 gr butter, room temperature  2 medium eggs, room temperature  80 g (± 3 tablespoons) sugar  80 g (± 1/3 cup) sesame paste  ¼ tsp fine salt  400 g all-purpose flour  5 g (± 2 tsp) baking powder To spread:  1 egg yolk, beaten  Sesame