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 Video

Watch what makes this Bubble Bar extra special: it foams and bubbles on contact with water.

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, that fine SLSA is horrible to work with and it results in 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!
Get SLSA Coarse now at Amazon

Bubble Bar Recipe Master

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

NOTE: INGREDIENT NAMES ARE LINKED TO AMAZON FOR EASY PURCHASE.

Ingredients

• 1 cup Tartaric Acid (not cream of tartar!)
• 5 1/2 cups Baking Soda
• 2 cups SLSA Coarse
• 1-1/2 cups Vegetable Glycerine
• 3 drops Coco Betaine
• 1 Tbsp Gel Colorant
• 1/3 cup Essential or Fragrance Oil
• 3 Mini Loaf Pans
• 1 Sculpey Super Slicer

1. STEP 1: Add Wet Ingredients to Dry Ingredients

• Put the dry ingredients in a medium bowl in this order: a) SLSA Course, 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.

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2. 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.

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3. 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.

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4. 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.

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   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.

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 cocobetaine?

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.