So my recommendation could be to order a distinct brand name of ground poppy seeds, if you can. A touch of bitterness is standard, and can be well balanced out by adding sugar or honey inside the cake batter. But if it’s an disagreeable bitterness, this shouldn’t be the case. https://charliezfday.shoutmyblog.com/31422021/what-does-austrian-poppy-seed-cake-mean