If you’ve never cooked quinoa before, you might be wondering how to make sure it doesn’t turn out bitter. The key is to rinse the quinoa before cooking it. This will remove any residual bitterness from the quinoa and help it to cook up nice and fluffy. Another way to make sure the quinoa isn't bitter is to cook it in chicken broth instead of water. This will give the quinoa a nice flavor and make sure that it doesn't turn out bitter.