Homemade Seashell Bath Bombs

Relax and unwind your day with these wonderful Mermaid Seashell Bath Bombs that you can easily make at home.

DIY Mermaid Shell Bath Bombs

Making bath bombs at home is so much fun. They are an awesome side hustle (if you sell on places like Etsy) and also make fantastic gifts. DIY bath bombs are also a simple craft that you can do with your kids. My kids love making bath bombs almost more than they love using them!


Tips for Making Bath Bombs at Home

If you are new to making bath bombs at home make sure to swing over and read all of our tips and tricks for making bath bombs at home before you get started.

Making bath bombs can seem like a big task, but I promise you it’s incredibly simple! Below you will find some hacks to make the bath bomb making process easier.

When it comes to bath bomb molds, not all are made equal. Metal bath bomb molds tend to be the most popular, however, I personally prefer silicone molds. Silicone bath bomb molds are a whole lot easier to pop the bath bomb out of (especially if you are crunched for time and can’t let your bath bomb dry overnight). Plus silicone is super easy to clean and store.

If you choose to use a metal bath bomb mold, one thing to keep in mind while mashing your bath bomb into one is to mash the bath bomb together side by side. If you attempt to mash the bath bomb mold top to bottom instead of side to side it will make getting the bath bomb out in one piece a bit harder. Remembering this simple trick will be a sanity saver when it comes time to remove your bath bomb from the mold.

Mixing ingredients also matters. I used to be one to just throw everything in and mix it all at once…then struggle with crumbly bath bombs. To avoid this, mix the wet ingredients together really well first. Then add the citric acid. This way you aren’t scrambling to beat the fizz. Also, keep some isopropyl alcohol close by for when you are adding your mixed ingredients into your bath bomb molds. You can use alcohol to dampen a mixture that is too dry without ruining the bath bombs.

And lastly, it is always a good idea to let your bath bomb sit in the mold overnight to dry.

After you have made your bath bombs, protect them from humidity by storing them in an airtight container.

How to Make These DIY Seashell Bath Bombs

Let’s get crafting! Below is our written tutorial.

Yield: 6 Bath Bombs

Mermaid Seashell Bath Bombs

Mermaid Seashell Bath Bombs

Enjoy a relaxing soak in the tub with these homemade seashell bath bombs!

Prep Time 10 minutes
Active Time 20 minutes
Additional Time 1 day
Total Time 1 day 30 minutes
Difficulty Easy
Estimated Cost $10


  • 1 cup baking soda
  • 1/2 cup citric acid
  • 1/2 cup cornstarch
  • 1/4 cup Epsom salts
  • 2 tbsp melted coconut oil
  • 1/2 tsp essential oil blend desired (we used coconut)
  • 1 tsp Okinawa blue mica powder
  • 1 tsp gold nugget mica powder
  • 2-4 tablespoons mermaid sprinkles blend


  • Shell Mold
  • 2 Mixing Bowls
  • Measuring Spoons
  • Spatula or Whisk


  1. Whisk together the baking soda, citric acid, cornstarch and Epsom salts.
  2. In a second bowl, combine the melted coconut oil, essential oil blend and alcohol together, mixing well.
  3. Add liquid ingredients 1 tsp at a time to the dry ingredients, mixing it together slowly so as not to start the fizzy reaction.
  4. To the bath bomb mixture, add in the blue mica powder and mix well. If you want more color, add some additional mica powder in 1 tsp increments.
  5. Dust the bottom of the bath bomb molds with the gold mica powder.
  6. Immediately pack the bath bomb mold overly full of the blue mixture. Then pack it down tightly and remove excess from the back.
  7. Press about 1 tsp of sprinkle mixture into the back of each bath bomb.
  8. Allow the bath bombs to rest in the mold for up to 24 hours before gently tapping the side of the mold to release the bombs.
  9. Use your bath bombs immediately or store in an airtight container until you’re ready to use!


For more fun DIY Bath and Beauty Projects visit DollarCrafter.com

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