This Cream of Asparagus Soup recipe shouldn't be bitter when using fresh, medium asparagus. Here are the guidelines to follow: 1. Trim the asparagus properly: The tough, woody ends of the asparagus can contribute to the bitter taste. Be sure to trim and discard the ends before using the asparagus in the soup. 2. Fully cook the asparagus: Cooking the asparagus in simmering broth breaks down some of the compounds that contribute to the bitter taste. 3. Use aromatics: Adding aromatics like onions, garlic, or shallots can help to enhance the flavor of the soup and reduce the bitterness of the asparagus. 4. Balance with acid: Adding a bit of acid, such as lemon juice or white wine vinegar, can help to balance out the bitterness of the asparagus. Just be careful not to add too much, as this can make the soup overly tart. Start with a small amount and taste as you go.