Why is pistachio ice cream colored green?

Here's a breakdown:

* Pistachios themselves are green: The green color comes from chlorophyll, the pigment responsible for photosynthesis in plants.

* Pistachio paste is made from ground pistachios: This paste is used to flavor and color pistachio ice cream.

* The paste contains chlorophyll: This natural pigment gives the ice cream its characteristic green hue.

Note: While some manufacturers might use artificial green food coloring in addition to pistachio paste, many high-quality pistachio ice creams rely solely on the natural coloring from the paste.