In this video, you’ll see how to make a super-simple compound butter using flower petals! Yes, the petals from the Nasturtium flower are completely edible. They have a mild radish-like flavor and give the butter beautiful color. This compound butter is incredibly easy to make. All you need are some unsalted butter, flower petals, and a pinch of salt. See how it’s done! Watch the video, then get the recipe for Chef John's Nasturtium Butter. Melt this gorgeous compound butter over grilled chicken, fish, and veggies.