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Rainbow Butter Slime Recipe

Rainbow Butter Slime Recipe

A fun and easy Rainbow Butter Slime recipe with simple steps, texture tips, storage hacks
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Prep Time 10 minutes
Cook Time 5 minutes
Total Time 15 minutes
Servings: 3 kids
Course: Dessert
Cuisine: American
Ingredients Equipment Method

Ingredients
  

  • 1 cup white school glue PVA glue works best
  • 2 cups shaving cream for fluffiness
  • 1 teaspoon baking soda
  • Contact lens solution with boric acid
  • Soft air-dry clay this is the butter texture secret
  • Food coloring or slime dye rainbow colors
  • A little lotion optional but very helpful

Equipment

  • 2–3 medium mixing bowls
  • A spoon or silicone spatula
  • Measuring cups (or just estimate, honestly)
  • Airtight containers (VERY important later)
  • A clean flat surface or tray
  • Paper towels (because… spills will happen)

Method
 

Step 1 – Pour the Glue (Start Calm, Not Rushed)
  1. Take a large bowl and pour in one cup of white glue.
  2. Pause for a second.
  3. Look at it.
  4. It’s plain. Boring. Slightly shiny. Totally normal.
  5. Give it a gentle stir just to smooth it out. No aggressive mixing yet. This isn’t a race.
Step 2 – Add Shaving Cream (This Is Where It Gets Fun)
  1. Now add about two cups of shaving cream.
  2. And yes, it will look like a fluffy cloud suddenly appeared in your bowl.
  3. Mix slowly.
  4. Then a bit faster.
  5. Then slow again.
  6. You’ll notice the mixture becoming airy and light — almost like whipped frosting. Which, by the way, looks edible but absolutely is NOT. Please don’t taste it. Been there as a kid. Regret level: high.
Step 3 – Baking Soda Time (Small But Important Step)
  1. Add one teaspoon of baking soda.
  2. Not a tablespoon.
  3. Not “a lot.”
  4. Just a teaspoon.
  5. Mix thoroughly until everything looks smooth. No powder lumps. No dry pockets. Just a soft, fluffy base.
Step 4 – Divide For Rainbow Colors (Slow Down Here)
  1. Now split the mixture into separate bowls depending on how many colors you want.
  2. Classic rainbow setup:
  3. Red
  4. Orange
  5. Yellow
  6. Green
  7. Blue
  8. Purple
  9. Add a few drops of food coloring into each bowl.
  10. Here’s a real tip — start with less color than you think you need.
  11. You can always add more.
  12. But fixing overly dark slime? Ugh. Annoying.
  13. Mix each color slowly and enjoy the process. This part is oddly relaxing. Almost meditative, honestly.
Step 5 – Activate The Slime (Patience… Seriously)
  1. Now comes the sensitive part.
  2. Add contact lens solution a few drops at a time while mixing.
  3. Not a full pour.
  4. Not a rush.
  5. Drops.
  6. Mix.
  7. Check texture.
  8. Repeat.
  9. You’ll notice the slime slowly pulling away from the bowl edges.
  10. That’s the exact moment you want.
  11. If it’s still sticky, add a tiny bit more activator.
  12. Tiny.
  13. Not dramatic.
  14. Over-activating is the number one mistake. And yes… I’ve ruined batches by doing that.
Step 6 – Add Air-Dry Clay (The Butter Texture Moment)
  1. Now this is the real transformation step.
  2. Take a chunk of soft air-dry clay and knead it into each colored slime portion.
  3. At first?
  4. It will feel weird.
  5. Sticky.
  6. Slightly messy.
  7. Kind of stubborn.
  8. Keep kneading.
  9. Don’t give up early.
  10. After 2–4 minutes, the texture suddenly changes. It becomes soft, smooth, stretchy, and — finally — buttery.
  11. That’s the moment you’ll go: “Ohhh… now I get it.”
Step 7 – Creating The Rainbow Swirl (My Favorite Part)
  1. Place all colored slimes side by side on a clean surface.
  2. Then gently fold them together.
  3. Not aggressively mixing.
  4. Not smashing.
  5. Just fold… stretch… twist… slowly.
  6. The colors will naturally swirl into a beautiful rainbow pattern.
  7. And honestly? This part never gets old.