Beat the two types of butter until frothy. Gradually stir in the sugar. Add the egg yolks and stir. Mix the flour, baking powder, baking soda and salt. Sift into the mixture and stir in.
Put the dough in the refrigerator for about 2 hours.
Then form small balls and roll them in the sesame seeds. Place the balls on a baking sheet lined with baking paper and flatten them a little with your thumb.
Bake the biscuits in the preheated oven at 160 ° convection on the second rack from the bottom for about 12-15 minutes until golden brown.
The amount of dough is enough for 50 - 60 biscuits.
Tip:
I use Dutch pindakaas, which is salted peanut butter. Then it also fits with the specified amounts of sugar.
Otherwise, it makes sense to reduce the amount of sugar when using sweetened peanut butter.