Greenies are a play on Brownies and Blondies. They are made using pistachios that you've pulverized in the food processor and the batter has a few drops green food coloring added to enhance its slightly green color. I originally saw this recipe months ago on The Crepes of Wrath. Sydney actually called them White Chocolate Marshmallow Pistachio Brownies. Is there anything in that name that wouldn't propel you to give them a try ASAP? I don't know what took me so long but I'm happy Jalen and I took the time to make them. Besides saying they were moist and tender, it's hard to describe their taste and texture properly, so, I won't. Hopefully, my photos will encourage you to give them a try! I didn't add the green food coloring so they aren't very green.