Create your own moment of zen.

By Katie Holdefehr
Updated October 05, 2017

If you’d like to whip up some soothing lavender bath bombs, but your kids would flip for the sparkly mermaid variety, you can make both types from the same bath bomb base. Start with a mixture of baking soda, cornstarch, Epsom salt, and citric acid held together with melted coconut oil. From there, you can add colors and sparkles designed specifically for the bath, or keep it simple with just a sprinkle of dried lavender. The kids can go wild with add-ins, while those with sensitive skin can keep theirs color- and fragrance-free. And there’s no need to buy fancy molds to form these bath fizzies: a mini muffin tin, a shaped ice cube mold, or even a vending machine capsule will do the trick. With so many ways to customize these bath bombs, mixing up a batch is the perfect activity for a party or a play date.

What You’ll Need:

  • 1 cup baking soda
  • ¾ cup cornstarch
  • ½ cup citric acid (found in the canning section of some supermarkets, or from Bramble Berry)
  • ½ cup Epsom salt
  • Coconut oil, melted
  • Witch hazel


  • Skin-safe colorants, such as La Bomb colors from Bramble Berry (we used cornflower blue, Irish green, and cantaloupe for the gemstone bath bombs)
  • Skin-safe glitter, such as this one from Bramble Berry
  • Skin-safe colored mica (we used this purple mica and this green mica in the mermaid bath bombs)

Note: Even if you use skin-safe colorants and glitter in your homemade fizzies, it’s always a good idea to rinse off after bathing with these bath bombs.

Follow These Steps:

Make the base bath bomb mixture:

  1. Mix together the dry ingredients, then slowly add the coconut oil, starting with just a couple tablespoons. Use your hands to incorporate the oil into the dry mix, slowing add more oil if needed until the mix clumps together and has a consistency similar to damp sand.
  2. Spritz with witch hazel as needed to keep the mixture damp enough to stick together. (Hint: Avoid using water, which will cause the mixture to fizz.)

To make the calming lavender bath bombs:

  1. Sprinkle dried lavender into a mini muffin tin.
  2. If you’re adding colorant, stir a small amount (about ½ teaspoon) of purple mica into the bath bomb base. Fill the muffin tin with the mixture, pressing down firmly to pack the mix into each section. To make ombre bath bombs, slowly add more colorant to the mix as you fill the tin. Let dry for one hour, then flip the tin upside-down on a cutting board. Tap the back of the tin with a spoon or spatula to release the bath bombs. Let them set overnight before adding them to a bath or packaging them as gifts.

To make the pastel gemstone bath bombs:

  1. Thoroughly mix a couple drops of liquid colorant into the bath bomb base. Fill both sides of the diamond ice cube mold, pressing the mixture down to pack it firmly and filling one side slightly higher than the top of the mold, forming a small dome. Press the two sides of the mold together and let dry one hour.
  2. Very carefully remove the top of the mold and slide the bath bomb out of the mold, supporting it with your hand and placing it gently on a paper towel to dry. Let set overnight.

To make mermaid bath bombs:

  1. Divide the bath bomb base into two or three parts, then add colorants and sparkles to each. Fill half of a vending machine capsule with the mixture, alternating colors and firmly pressing the mixture into the mold.
  2. Let dry one hour, then flip the capsules over to release the bath bombs. Let dry overnight before throwing them into the tub for a magical mermaid bath.