Poppy seeds boil for 5 minutes and let it swell in boiling water under the lid 20 minutes after straining through a sieve.

Whisk the yolks with sugar and butter, add poppy and flour with baking powder.

Separately whip the egg whites to soft peaks and gently insert them into the dough.

Put the dough in a greased form and bake the makovnik 30-40 minutes at 180 degrees.