Bath Bomb Embeds for Spin and Fizz

Wondering how to make a bath bomb embeds so that your bath bombs will spin and fizz? It’s so easy,  you won’t believe it. The key is to make what’s called a “Bath Bomb Embed.” An embed is like a mini-bath bomb that goes in the center of the bath bomb mold.

An embed will give your bath bomb an extra boost of excitement and fizz. And here’s the trick: Place your embed off-center to make your bath bomb spin!

Place bath bomb embed off-center to make bath bomb spin
Place your bath bomb embed off center to make it spin. After I took this photo, I covered the mold with the embed with more bath bomb mixture and packed it in tight before I fit the two halves of the mold together.

How to Make a Bath Bomb Embed

So this is the important thing about making embeds: You need equal parts baking soda and citric acid. (This is a different ratio than you’ll find in a bath bomb recipe where it’s usually 2 parts baking soda to 1 part citric acid.) You also need a spray bottle full of witch hazel.

You might also want to add colorant and/or glitter to your embed.

While no one will see the embed, if you add color it will change the color of the water slightly. I say slightly, because embeds are small relative to the size of a bath bomb. Also if you add glitter, the embed fizzes so much that it will disperse the glitter across the surface of the bathwater.

Make Your Bath Bombs Spin and Fizz Like Crazy


  • Citric acid
  • Baking soda
  • Colorant (optional)
  • Glitter (optional)


  • Rubber gloves
  • Mixing bowl
  • Sieve
  • Spray bottle (for witch hazel)
  • Mold for embeds – You can use almost any kind of mini-mold. You can use a small ice cube tray. You can also use a soft silicone mold from the candy aisle of the craft store.
  • Cookie sheet or cutting board


  1. Put on rubber gloves.
  2. Sift citric acid and baking soda into mixing bowl. Also sift colorant if using.
  3. Mix well with your hands. Add glitter if using and mix.
  4. Spray dry mixture 1-2 times with witch hazel. Rub between open palms to mix well. Test consistency to see if the mixture can keep its shape. To do this, squeeze a handful of mixture in your fist. Does it form a ball? If not, spray 1-2 times again, mix and retest. Repeat until mixture is the right consistency. You want to go slowly so you don’t get the mixture wetter than necessary.
  5. Fill your mini-mold with the mixture. Press down hard on each mold. If using a hard plastic ice cube tray, once the cavities are full, tip the ice cube tray over onto a cookie sheet or cutting board where embeds can dry. If using a flexible silicone mini-mold, let embeds dry inside of mold. Set aside embeds to dry for 3 hours.
  6. You can always cut your embeds in half when using inside smaller bath bombs.

Storage and Expiration

Learn how to store your bath bomb embeds and how long they will last.

A jar full of embeds


Here’s my curated list of recommended bath bomb supplies and ingredients from Amazon.

Tags: bath bomb, DIY, homemade, recipe

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