You can put anything you think is tasty into compound butter. However, no matter what you're elevating it with, the fat needs to be soft (but not melted) when you start.

Chop your leftover herbs and divide them into the individual molds in the ice cube tray. Top each mold off with a cooking oil of your choice. Dosing and proportions are entirely up to you.

The best bet for an approach like this is to blend an herb — or multiple herbs — after having blanched them for 10 to 15 seconds. Add a touch of oil and then freeze in ice cube trays.

Ceramic Herb Tray With Pots. williams-sonoma.com. $59.95. What to Look for When Buying an Indoor Herb Garden.