If you fill the whole ice cube tray and you still have more pesto, grab a second tray to use. [substeps] The pesto may stain light-colored ice cube trays, so use trays you don't mind getting discolored.
[header] How to freeze pesto [title] Scoop your pesto into an ice cube tray using a spoon. [step] Fill each cell in the ice cube tray evenly. Don't put so much pesto in that the cells overflow into each other.