Science, Tech, Math › Science How to Make Metamucil Flubber Recipe for Edible Gelatinous Slime Share Flipboard Email Print Howard Kingsnorth / Getty Images Science Chemistry Activities for Kids Basics Chemical Laws Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. our editorial process Facebook Facebook Twitter Twitter Anne Marie Helmenstine, Ph.D. Updated January 15, 2020 This recipe makes the non-sticky sort of 'rubber' or gelatinous slime that is known as flubber. The difficulty is average, but only takes about 15 minutes! The slime is non-toxic and safe to eat. Flubber Slime Ingredients 1 teaspoon Metamucil or similar soluble fiber8 ounces watermicrowave-safe bowlmicrowave ovenfood coloring (optional) How to Make Metamucil Flubber Mix 1 teaspoon of Metamucil with 1 cup (8 ounces) of water in a microwaveable bowl. You can add a drop or two of food coloring if you wish. Alternatively, you could add a little powdered drink mix or flavored gelatin to get color/flavor.Place bowl in the microwave and nuke on high for 4 to 5 minutes (actual time depends on microwave power) or until the goo is about to bubble out of the bowl. Turn off the microwave.Let the mixture cool slightly, then repeat step 3 (microwave until about to overflow). The more times this step is repeated the more rubbery the substance will become. The purpose of the cooling step is to check the consistency of the slime and prevent it from overflowing the container.After 5 to 6 microwave runs, (carefully, as it will be very hot) pour the flubber onto a plate or cookie sheet. A spoon can be used to spread it out.Allow to cool. And there you have it — non-stick flubber. A knife or cookie cutters may be used to cut the flubber into interesting shapes. The shapes will slowly "melt" as the slime flows.Flubber can be stored at room temperature in a sealed baggie for several months. It will last indefinitely in a sealed bag in the refrigerator. If the flubber is sticky then the amount of water needs to be reduced. It should be clammy, but not gummy. Please use adult supervision, as molten fluids and microwaves are involved.