How do you substitute anise extract for recipe calling for one star anise?

To substitute anise extract for one whole star anise, use about 1/2 to 1 teaspoon of anise extract, depending on your taste preference. Start with the smaller amount, as extracts can be more concentrated in flavor. Since anise extract is liquid, you may want to slightly reduce other liquids in the recipe to maintain the right consistency. Adjust as needed based on the specific flavors of your dish.