So my recommendation would be to buy a special brand of floor poppy seeds, If you're able to. A hint of bitterness is ordinary, and can be well balanced out by including sugar or honey during the cake batter. However, if it’s an uncomfortable bitterness, this shouldn’t be the case. https://decorativedriedflowers13343.boyblogguide.com/31146340/dried-poppy-pods-for-crafts-can-be-fun-for-anyone