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Bubble Bar Recipe Master – Easy bubble bars at home!

Bubble Bar Recipe Master – Easy bubble bars at home!

This bubble bar recipe is the secret to soft bubble bars that foam and bubble on contact with water!  They are the coolest, cutest bars because they crumble easily and make mountains of long-lasting, creamy bubbles.

This master formula took over a year to perfect and was a top seller at FizzButter.

Bubble bar with three layers

With this Bubble Bar Recipe you can do designs like this three layer bar.  It has two rose pink gradients and the top layer is white with pink epsom salt.  Use your imagination!

Two Layer Bubble Bar

Two layer Bubble Bar with Pink and Yellow. Think about what your colors will look like combined in the water, too. Pink and yellow = peach!

Sodium Lauryl Sulfoacetate (SLSA) Ingredient Spot light

SLSA is a powder made from coconuts and is gentle to the skin. It makes long lasting, creamy bubbles. Always buy coarse SLSA.
Please note, fine SLSA is horrible to work with and it results in a hard, brick-like bars that do not dissolve well. In addition, fine SLSA makes a big mess. It is never worth it so don’t even think about it. Always buy coarse SLSA!
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SLSA Coarse

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Bubble Bar Recipe Master

Recipe author:  Yield: 15 bubble bars. Prep time: 15 minutes Cook time: 4 hours Total Time: 4 hours 15 minutes


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  1. STEP 1: Add Wet Ingredients to Dry Ingredients

  • Put the dry ingredients in a medium bowl in this order: a) slsa, b) tartaric acid, and b) baking soda.
  • Next, add the wet ingredients in this order (on top of the dry ingredients): a) glycerine, b) fragrance and c) CocoBetaine.

  1. STEP 2: Make White Base

  • Mix together all ingredients (but color).
  • You should end up with a soft, cookie dough consistency.
  • If your mixture is still powdery and not holding together, add a small amount of vegetable glycerine. If your mix is extremely dense and brick-like, add another drop of coco betaine.

  1. STEP 3: Add Color

  • Add color to you white base. You can divide the white base and add different colors for different layers.
  • Micas and shimmers can also be used in this base.

  1. STEP 4: Mold in Small Loaf Pans (or any mold)

  • Line each loaf pan with wax paper. Put a strip on the narrow side and the wide side.
  • Pack your colored mixture into your lined loaf pans.
  • Let these sit in the loaf pans for 2-4 hours before you slice them. Some bubble bars will rise more than others. That’s okay, just check them periodically and flatten the loaf back down in the pan. Don’t try to cut the bubble bars while they are still in the ‘rising’ phase.

  1. Resting Bubble Bars

    STEP 5: Cut your Bubble Bars

  • Unmold the loaf on a sheet of wax paper. Use the sides of the wax paper to make the final shape of your loaf.  You can still shape it at this point before you slice it. It should be firm, but not hard.
  • Slice into 3/4 to 1 inch slices with a Sculpey super slicer
  • Let them cure for two days before packaging.  Store bubble bars out of sunlight!  The sun can degrade the color and fragrance.

Get a Sculpey Super Slicer
Super Slicer

Bubble Bar Recipe Troubleshooting

Have I added enough glycerine?

If your mix is still powdery and does not hold together like a soft cookie dough, it needs more glycerine.

Have I used too much or too little coco betaine?

Even though just a few drops of this go into a bubble bar, it can make a HUGE difference. In addition, it will vary with different fragrances. Example: Eucalyptus essential oil will cause the bubble bar to rise less vs. almost any other fragrance oil.

Don’t leave out the Coco Betaine!

Unfortunately, if you leave out the coco betaine, you will get a dense, brick-like bubble bar that it hard to crumble. It is like making bread without the yeast.

Don’t do it. Whereas, if you add too much coco betaine, your molded mixture will rise and spill over the sides of the pan. Don’t worry. If this happens, just wait to cut your loaf after it completely relaxes.

NOTE: Now that you have coco betaine and SLSA on hand, you can also make our Floating Bath Bombs.

Have I undermixed my wet/dry mix?

If you mix it right, you will have a soft cookie dough consistency and the color is evenly distributed and not speckly.

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Bubble Bar Recipe
Average rating:  
 4 reviews
 by Tina

So easy to make! I gave them as gifts to the women at my book club. Everyone loved them!

 by Chris

I loved these from FizzButter!!!! A-may-zing! Thanks for sharing.

 by Ginger

These were very easy to make and they worked great. Thanks for linking to exactly the items that I need!

 by Cindy Lou Who

These are the best thing that ever happened to my wine and bath night.

Do you have bubble bar making questions?

Use the comment button below to post any questions you have. I will respond to all questions!

Bubble Bars Curing


Friday 20th of May 2022

Hi there. Are these supposed to remain soft after you remove them from the mold. They did not get very hard. Thank you.


Wednesday 31st of May 2023

They should be a little soft like a piece of cake. If they get too hard, they do not dissolve as well. If you like them harder, add a little more liquid to mixture but start with 1/8 teaspoon. A little goes a long way.


Wednesday 4th of May 2022

Hey, if I wanted to add a small amount of oil to this recipe, would I just have to add more dry ingredients? Thank you


Wednesday 31st of May 2023

I would add a little more dry SLSA if you want to maintain bubble strength or perhaps baking soda. They may dry softer, too. So, watch out for that.

Jasmine O.

Thursday 24th of February 2022

Hello! Thanks for this recipe. Would the use put in the entire bubble bar or break it in half? Thanks.


Saturday 2nd of April 2022

Usually, use an entire bubble bar. It depends on size of bar and tub and fragrance strength.


Wednesday 13th of January 2021

Silly question, I've never seen these before. How do you use a bubble bar?


Sunday 26th of September 2021

Crumble it under running water for fabulous bath bubbles.


Monday 17th of August 2020

Can you use citric acid in place of Tartaric Acid?


Monday 24th of August 2020

No, it will ruin the batch. One of my employees did it by mistake once and we had to throw it all away.