Bath Bomb Recipe without Cornstarch (2024)

By Andrea Vaughan | Updated on June 2, 2020

If you’re looking for a simple bath bomb recipe without cornstarch, this is it!

When I first started making DIY Bath Bombs, I was a little overwhelmed by the number of ingredients. Baking soda, citric acid, cornstarch, epsom salt, coconut oil, essential oils, etc. I remember wanting a super simple recipe to get me started.

Well, if you’re like me, and want something really easy without a ton of ingredients, making bath bombs without cornstarch is about as easy is it gets!

But before we get into the recipe, let’s start with a few basics.

What is the Purpose of Cornstarch in Bath Bombs?

Cornstarch in bath bombs help slow down the reaction of the bath bomb by binding together the baking soda and citric acid. It makes the bath bomb dissolve slower.

Can you make Bath Bombs without Cornstarch?

Yes, you can make bath bombs without cornstarch. The bath bombs will dissolve more quickly, but as long as you still have baking soda and citric acid, you can make bath bombs.

Bath Bomb Recipe without Cornstarch

To make bath bombs without cornstarch, grab your ingredients.

• 1.5 cups Baking Soda
• 1 cup Citric Acid
• 1/2 cup Coconut Oil
• 20 drops Essential Oils (optional)
• Bath Bomb Molds

Start by combining baking soda and citric acid in a bowl. Stir to combine well. Add coconut oil and essential oils.

With your hands, work the coconut oil into the dry ingredients, until you get the consistency of wet sand and the mix starts to hold together.

Press mixture into each half of your bath bomb molds, slightly over-filling each half, then press halves together firmly.

I usually let my bath bombs sit a couple hours, but they need to sit at least 15 minutes, or they’ll likely break in half.

When ready to remove, use a spoon to gently tap the bath bomb mold, then slowly remove molds.

Allow bath bomb to dry for 24 hours before using.

How Long will Homemade Bath Bombs Last?

Homemade bath bombs will last up to 6 months, as long as you keep them away from moisture.

How do you get Bath Bombs out of the Mold?

Let the mold sit for 15 minutes. Use a spoon to tap the outside of the mold, on both sides, to loosen the bath bomb. Open the mold and gently remove the bath bomb and place on parchment paper to dry, for 24 hours.

Are Bath Bombs Safe for Kids?

Yep! Bath bombs are made with natural ingredients (no chemicals or artificial ingredients) so they are safe for kids.

If your child does have any allergies, be cautious of what essential oils or other oils you add to your bath bombs. For example, if your child has a tree nut allergy, don’t use almond oil in the bath bombs.

What Essential Oils are Good for Bath Bombs?

I love adding essential oils to bath bombs because they make them smell great, and are all natural! Many essential oils are great for bath bombs, including:

• Lavender essential oil
• Rosemary essential oil
• Geranium essential oil
• Tea Tree essential oil
• Chamomile essential oil
• Peppermint essential oil
• Eucalyptus essential oil
• Rose essential oil

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Save this to your all natural bath and beauty board so you can make it whenever you want!

More Bath Bomb Recipes

I have a lot of bath bomb recipes if you want to try some different kinds! Check these out:

• DIY Mini Bath Bombs
• Lavender Bath Bombs
• Homemade Calendula Bath Bombs
• Bath Bombs for Kids (with hidden toys inside!)