Start by pouring (1) 3.4-ounce box of instant pudding mix into a medium mixing bowl. This is where all the fun begins—your slime is going to smell amazing!
Add 1 cup of cornstarch to the bowl and whisk it together with the pudding, removing as many lumps as possible.
Slowly pour in ⅓ cup of warm water, about a tablespoon at a time, mixing as you go. Use your hands to knead it once it starts to come together. The texture should feel soft and squishy, but not sticky.
Finally, knead in 1 teaspoon of coconut oil. This will give the slime a smooth, stretchy texture. Allow the slime to rest for 3-5 minutes to give the starches time to hydrate and the slime time to settle into its final texture. It’ll get noticeably softer and easier to work with once it has rested.
If the slime feels dry or starts to crack as you play with it, just add a little warm water—start with a splash and work it in with your hands. On the other hand, if it’s too sticky and clings to your fingers, sprinkle in a bit more cornstarch and keep kneading. You’re aiming for that perfect in-between: soft, stretchy, and fun to squish.