To make Nickelodeon's official slime recipe, combine equal parts vanilla pudding, applesauce, cornstarch and hot water in a bowl, then add green and yellow food coloring until the mixture is the distinctive shade of bright green, and stir well. An alternative method of making “Gak,” the iconic green slime seen on Nickelodeon television shows, involves using Jell-O, water, flour and baby shampoo.
The alternative recipe makes a larger amount of slime. This is done by pouring 6 large packages of Jell-O, 1 gallon of water and 4.5 pounds of flour into a 5 gallon bucket. Whisk the mixture together thoroughly to remove any lumps. Add another 4.5 pounds of flour and 0.5 gallons of water to the mixture until the slime reaches the desired consistency. Add 8 ounces of Johnson's baby shampoo and food coloring, and stir well. This recipe makes 3 gallons of slime. Unlike the Nickelodeon recipe, this formula is not edible.
The bright green slime debuted on the Nickelodeon sketch comedy show "You Can't Do That on Television" in the 1980s and later appeared on some of the network's game shows, including "Wild and Crazy Kids" and "Double Dare." Celebrities from actress Amanda Bynes to musician Coolio have been "slimed." Nickelodeon sells a ready-made version of the goo under the name "Gak."