Marshmallow Peeps Green Chicks are great for filling up those Easter Baskets! Peeps were first made in the 1920s, but were not popularized until 1953 when the Just Born Company began manufacturing them. With improved technology, the time to make a single Peep reportedly has dropped from 27 hours in 1953 to about 6 minutes. Nothing says spring like the marshmallow goodness of green PEEPS® Chicks. Now you can brighten up any season with these soft and sugary treats. Fat free. Gluten Free.