How Do I Make a Fizzy Bath Bomb?

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  • Written By: Megan Shoop
  • Edited By: Michelle Arevalo
  • Last Modified Date: 15 September 2019
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A fizzy bath bomb is basically a mixture of bath salts formed into a tight, dense, little ball. When tossed into hot bath water, bath bombs fizz apart and usually give the water color, scent, and skin-nourishing benefits. If you’re looking for an inexpensive way to relax, a fizzy bath bomb may be just the ticket. To make your own fizzy bath bomb, you need to carefully mix together the right proportions of citric acid, baking soda, witch hazel extract, scent, and color. Once mixed, you must press the mixture into the mold of your choice and let it set for at least 24 hours. Shorter setting times may cause the bombs to crumble.

Mixing bath bombs can be a tricky process that must be finished without long pauses between the steps. It is usually best to have all of your ingredients and tools ready before you start mixing. Citric acid is a white powder that tastes very sour and helps hold these bombs together. Baking soda causes the fizzing action and is a catalyst for carrying your chosen scents and oils into the bathwater. Witch hazel extract is a spicy-smelling substance that activates the citric acid in a fizzy bath bomb mixture and causes it to clump.


Oils in a fizzy bath bomb may include scented essential oils and moisturizing kinds, like olive, jojoba, or safflower oil. For coloring, you may choose to use ordinary food coloring or the more concentrated dyes used to color fondant and frosting. You will also need measuring spoons, a whisk, rubber gloves, a plastic spray bottle, and some kind of mold. Candy molds and hollow plastic Christmas balls work well for shaping bath bombs.

The usual mixture for homemade fizzy bath bombs starts with 1 part baking soda and .5 part citric acid. It is essential to whisk these two ingredients together for at least one minute, ensuring that they are thoroughly blended. Otherwise, the bombs may not dissolve properly in the water. After that, you may add a spoonful or two of oil, and up to 20 drops of food coloring or fondant dye. Do not start stirring the mixture yet, however.

It is recommended that you wear rubber gloves for the next step to protect your hands from the concentrated bath bomb ingredients. Fill a spray bottle with witch hazel extract and gently begin stirring the fizzy bath bomb mixture with a gloved hand. With the other hand, spritz the mixture with witch hazel extract. The mixture should begin forming large clumps, and become thicker and harder to stir.

When thick, scoop up a little of the fizzy bath bomb mixture and press it into the molds of your choice. Soap and candy molds come in dozens of different shapes and sizes for all kinds of tastes. You may also simply use hollow, round plastic Christmas ornaments, often found in craft stores. Once the molds are packed full of the mixture, allow the bombs to set for 24 hours. When done, gently flip each mold over and tap it lightly with your fingers. The mold should release the bath bombs easily.


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Post 3

I learned a great tip today for bath bomb making. Applying a tiny amount of cyclomethicone on the inside of the molds make it easier to remove the bath bombs later!

Post 2

@ddljohn-- Yes, you can definitely make surprise bath bombs with different decorations, colors and herbs. You might want to practice making some simple bath bombs first though if you have never made them before.

Once you have the process down, start experimenting by putting coloring in the very center of the bath bombs. All you have to do is prepare an uncolored bath bomb mixture and place them into the molds. Use the steel molds where the two halves come together to make a bath bomb. At the center of each mold, place a little bit of color, making sure that the color doesn't reach all the way down in the mixture.

When you close the mold and

then remove the bath bomb, it will just look like a white bath bomb. If you use different colors, the color will come as a surprise while bathing. You can do the same thing with flower petals and other ingredients to keep them a surprise.
Post 1

Is it possible to make homemade bath bombs that resemble more fancy, commercial versions?

I love commercial bath bombs with secret ingredients and surprise colors. It makes bathing very exciting because I'm so curious about all of the herbs and decorated items in the bath bomb. But these types of bath bombs usually cost more and I can't afford to use them often. If I could make something similar at home, it would be wonderful. It would make a great gift for friends and family as well!

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