DIY Chocolate Bath Bombs

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Daniela Kretchmer
Updated: Feb 14, 2025
Bath Bombs, Chocolate

Learn how to make a chocolate bath bomb with this easy step by step tutorial. It’ll be like you’re bathing in hot chocolate – so it’s really like a hot chocolate bath bomb.

The great part about homemade bath bombs is they don’t require very many ingredients to make. Even so, this recipe requires fewer since it doesn’t use essential oils or dyes. Instead, both the scent and color come purely from the cocoa powder. Yes, you’ll use actual chocolate for these homemade bath bombs! And I share a variation to make one that looks like an actual Hershey’s bar using a custom chocolate bar mold.

Having a hot chocolate bath also doesn’t just sound like an amazing dream. In fact, cocoa can actually be good for your skin and help even your complexion (source). And by making your own chocolate mold, it’ll look like you’re dropping real Hershey’s chocolate into the tub!

You’ll want to gather the ingredients listed below to make your homemade chocolate bath bomb. This recipe was even featured in Apartment Guide as a great at-home date night idea!

Note: Some links in this post may contain affiliate links, which means at no cost to you, I may earn a commission.

Materials for DIY Chocolate Bath Bombs

1 Cup Baking Soda (Amazon)
½ Cup Corn Starch (Amazon)
½ Cup Citric Acid (Amazon)
Cocoa Powder (Amazon)
Bath bomb mold (you can also use one of these household items for as a mold)
Chocolate bar mold (I made my own DIY mold, but you can also get one on Amazon)
Water (putting it in a spray bottle makes the process easier)

30PCS- Bath Bomb Mold Kit, 15 Set 3 Size Mold & Bath Bombs Press for DIY Making Supplies

Milliard Citric Acid 1 Pound - 100% Pure Food Grade Non-GMO Project Verified (1 Pound)

Silicone Break Apart Chocolate Molds - Candy Protein and Energy Bar Silicone Mold

ARM & HAMMER Baking Soda Made in USA, Ideal for Baking, Pure & Natural, 2.7lb Bag

Argo 100% Pure Corn Starch, 16 Oz

NESTLE TOLL HOUSE Cocoa 8 oz. Plastic Canister

Video Instructions to Make Chocolate Bath Bombs

Steps to Make Chocolate Bath Bombs

Combine the baking soda, citric acid, corn starch, and coca powder. The cocoa powder should be added for sent and color so the amount you use is up to you.

Next, gradually add small amounts of water and mix it in until the consistency feels like wet sand.

You’ll see when you start adding water that the mixture will begin to fizz – you’ve ultimately started the bath bomb fizzing! Therefore don’t add too much water, otherwise you will use up all of your bath bomb fizz.

Tip: This is where the spray bottle comes in as it will make it easier to not add too much moisture.

Once your mixture is ready, you can start molding your bath bombs.

If you’ve never used a bath bomb mold, it’s easy! Fill the two halves of the bath bomb mold or plastic fillable ornament and press them together.

Tip: Filling the molds can actually work to your advantage. After you press the halves together, you can wipe away the extra.

Lastly, carefully remove the molds and leave your newly created bath bombs to dry for at least 24 hours. Then they’re ready to use!

How to Make the Bath Bombs Look Like Chocolate Bars

In order to make the chocolate bar bath bomb, use a chocolate mold and do a similar process as before by pressing the moistened bath bomb mixture into the mold.

Note: I made this Hershey’s chocolate bar mold when I made DIY chocolate chalk. But the summary is I used an actual Hershey’s bar and some mold putty to create the mold.

Finally, very carefully, flip the chocolate bar mold over, pushing on the back lightly to release the bath bomb.

Frequently Asked Questions

What do I do if the bath bomb breaks?

The great thing about bath bombs is the mixture can be re-used so if your bath bomb breaks while making it, simply crumble it up and try again. Keep in mind, you may need to add a bit more water to make it like wet sand again.

What if the mixture doesn’t stay together?

This probably means your mixture is too dry. To fix this, try gradually adding a little more water until your homemade bath bomb stays together.

If video is more your thing, you can also watch the full chocolate bath bomb tutorial here:

What's the best way to use them?

I put together this guide on how to use a bath bomb that has some great tips!

They can also be part of a 30 day self-improvement challenge as a way to pamper yourself or even as part of a spa date night from this list of alphabet dating ideas! But of course they’re perfect for your self care routine.

More Chocolate Crafts and Tasty Creations to Make

And if you’re interested in making other types of bath bombs, take a look at the Pokemon Bath Bomb. Or for another chocolate bar project, try making chocolate sidewalk chocolate.

Then for more bath items that look like food, but aren’t edible, try making these easy popsicle soaps.

Or if you want to actually eat some chocolate, try making some s’mores brownies.