So my recommendation can be to acquire a unique model of ground poppy seeds, if you can. A touch of bitterness is standard, and might be well balanced out by adding sugar or honey while in the cake batter. But if it’s an unpleasant bitterness, this shouldn’t be the case. https://rylanyzyvs.thelateblog.com/32528875/the-ultimate-guide-to-dried-poppy-pods-for-crafts