If you are new to making bath bombs and want to give them a try, here is my favorite basic bath bomb recipe. There is no perfect recipe for making bath bombs because it all depends on where you live. You might need to modify it depending on your climate and humidity level where you live. (I’ll have more blog posts soon on how to modify recipes for dry and humid climates.)
Ingredients
- Baking Soda – 1 cup (250 grams)
- Citric Acid – ½ cup (100 grams)
- Cream of Tartar – 1 tablespoon (12 grams)
- Kaolin Clay – 1 tablespoon (3 grams)
- Corn Starch, Tapioca Starch or Arrowroot Powder – 1 tablespoon (10 grams)
- Avocado Oil – 1 teaspoon (5 grams)
- Polysorbate 80 – 1 teaspoon (5 grams)
- Scent – 7 grams
- Color
Equipment
- Mixing bowl
- Measuring cups/spoons or digital scale
- Hand mixer
- Spatula
- Mold
- Face mask, gloves and hair net
- Spray bottle with binder (I use a 50/50 blend of alcohol and water)
Step 1: Measure or weigh all the dry ingredients into your mixing bowl. In another container (a small measuring cup works well), measure or weigh all the wet ingredients and mix them together. If you’re using a butter in place of the avocado oil, be sure to melt it first.
Step 2: Pour the wet ingredients into the dry ingredients and immediately start to mix. If you let it sit, it will react and fizz.
Step 3: Blend the mixture using a hand mixer or a stand mixer. I haven’t found that the powders jump into the air when mixing. If you’re concerned, you can cover the bowl with a towel as you mix.
Mix for about a minute. This helps to break up clumps and aerate the mixture. You can also break up any clumps using your hands if needed. Remember that oil clumps in your mixture can cause warting, so be sure to break them up.
Step 4: Add your coloring (if you’re using one) and mix using a hand mixer to disperse. I used a pinch of Batch Certified Yellow 5 Lake and Blue 1 Lake to get this nice sea foam green.
Step 5: Test your mixture to see if it’s ready. It shouldn’t be ready yet, but I want you to feel it and see how it looks at this stage.
To test your mixture, grab a handful of mixture and squeeze it to compress. Note the results. Does it stay compressed or does it fall apart? If your mixture is anything like mine at this point, it will crumble easily and won’t hold its shape. (I tested and took the pic before adding my color.)
Step 6: Wet the mixture to get it to the correct consistency for molding.
Wet your mixture using a fine-mist spray bottle of binder. Spray five times, then test again. Because your spray bottle will vary from mine, I can’t tell you exactly how many sprays it will take. Test often to not over-spray.
The mixture feels like lightly damp sand, not like wet sand, which would be too much moisture.
I like to test mine by tapping it with my thumb. It should stay together and not break apart easily. Some makers hold the clump of mixture in the air (maybe 10-12 inches) and drop it into the bowl. If it stays together, it’s ready.
This really is the hardest part! If you can get this part down, you can successfully make bath bombs!
Here are some tips:
- Test your mixture often to not over-spray. Spray five times and then test it. Not ready? Spray another five times. You’ll soon know how much it takes and can spray more between testing. Don’t overdo it when first starting.
- Use a fine-mist spray bottle to have better control and dispersion of the spray. Don’t use a huge plastic spray bottle from the cleaning aisle at the supermarket. Those will spray too much.
- If you do add too much moisture, you can add a bit more baking soda and/or citric acid to dry it out.
Step 7: Now that your mixture is the perfect consistency, it’s time to mold! You can use any type of bath bomb mold that you like. If you are new to making bath bombs, hard plastic molds tend to be easiest to use. Pack your mixture tightly, pressing down firmly.
If you’re using these plastic tray molds, you can actually let your bath bombs sit for about 10 minutes to harden a bit. This will help them unmold without any issues.
If your bath bomb crumbles or breaks during unmolding, simply mix back into the batch and start over with molding.
Step 8: Allow your bath bombs to dry 12-24 hours before packaging.
Happy Bath Bomb Making! -Amanda Aaron
Thank you so much Amanda. Finally a recipe in grams. I was going crazy trying to find one. Thank you. 🙂
You are welcome!
Hi, how would I change this recipe to add Cocamidopropyl betaine.
Question were can I find the liquid surfacant you use in your bath bomb book..Fun In The Tub
Hello! I get the Bubble Up from Wholesale Supplies Plus. But you can use any liquid surf. Cocamidopropyl betaine
What’s the “binder” made of in the spray bottle?
50/50 Easter and alcohol she mentioned
Could I just add a teaspoon of SLSA?
Sure you could add some SLSa! 😊
How many bath bombs does this yield on average?
Why are my bath bombs puffing up like a fresh baked cake right out of the oven?
We find this generally happens with bath bombs that are super fresh! If they were more than 3 days old and this still happened then you might need to reduce the slsa in your recipe!
Can I add butters to this as well. How do I know how much to add?
I live in Las Vegas with low humidity. Would I need to add more oil to the recipe to prevent crumbling or just spray more water
SO glad I found this group! I’ve been at this for 4 months and it’s always hit or miss. Thanks, Robyn!
How much SLSa would I use for this recipe?
Also, if I wanted to use cocoa butter too, would I reduce the avocado oil? Or up the baking soda/citric acid?
A lot of recipes call for 2:1 baking soda to citric acid. Do you use more baking soda so it’s less fizzy? Personally, I want mine to be more foamy, so this might work well for me.
hello so I tried this out and it made a perfect bath bomb so I have been making multiple batches to make one bath bomb at a time but I was wanting to make more than one bath bomb at a time. this made me one 3 inch bath bomb how would I reformulate this to be able to make 18-20 out of one batch ?
I have bought Robyn’s book bath bomb revolution and love it and was wondering if there was an even more advanced recipe?
If this made one bath bomb, then just multiply the amount of each ingredient by the number of bath bombs you want to make … That would tell you how much of each ingredient you need to make the amount you want.
I would like to subscribe to new email notificates
How do you find your book to buy? Amazon?