Oobleck is made with a combination of cornstarch and water. You will want to keep additional cornstarch on hand if you need to thicken the mixture. Generally, the oobleck recipe is a ratio of 2:1, so two cups of cornstarch and one cup of water.
1. In your bowl or baking dish, add the cornstarch. You can start mixing the oobleck in a bowl and then transfer it to a baking dish if you prefer.
2. If you want to give your oobleck a color, add food coloring to your water first.
Remember that you have a whole lot of white cornstarch so you will need a good amount of food coloring if you want a more vibrant color. We added yellow food coloring for our Halloween theme!
3. You can try mixing up your oobleck with a spoon, but I guarantee you are going to need to get your hands in there at some point during the mixing process.
There is a Gray area for the right oobleck consistency. First, you don’t want it to be very crumbly, but you also don’t want it to be very soupy either. If you have a reluctant child, hand them a spoon to start! Let them warm up to the idea of this squishy substance. Never force them to touch it though.
obleck is a Non-newtonian fluid which means it is neither a liquid nor a solid. You should be able to pick up a chunk of oobleck and form it into a ball before it turns back to liquid and drops back down to the bowl.
Once you have your oobleck mixed to the desired consistency, you can add your accessories as desired and play!
TIP: If it’s too soupy, add cornstarch. If it’s too hard and dry, add water. Only add in small increments till you get the desired consistency.
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