You have two options. Beneath each recipe, you can either write a comment on the recipe page, or you can click the Questions tab to pose your question to our entire community using the Food52 Hotline.
If you go the Hotline route, you'll see that the first field is pre-populated with the title of the recipe you're asking about. Add the specifics of your question to the second field; add tags (which are a way to categorize your question); add an image if you wish; click on "Ask Now," and soon you'll have some answers to your question from our community.