How to Make a Bath Bomb: The Ultimate Guide

Bath and body products are an essential part of our life. After a long day, nothing feels better than stepping into the tub with ease, thanks to these wonderful items! But let’s face it: some brands can be too harsh on your skin or just cost way more than you would like. 

Discover the ‘secrets’ Professional Bath Bomb Makers use to create luscious bath bombs with this step-by-step guide. You’ll have a priceless reference collection of product recipes with natural ingredients designed to create a relaxing spa atmosphere in your own home.

This is why we’ll make our own bath bombs at home today. They’re chemical-free and totally affordable! Plus, once you’ve learned how to properly use a bath bomb, you’ll never want to go back because these natural creations smell amazing without any harsh ingredients that will irritate sensitive skin or wallets alike.

The tools you need to get started

One of the best things about making bath bombs is that you can basically start right away without having to buy anything special. Most tools needed, most likely already have at home.

Here is the list of tools you need.

Large mixing bowl

Small mixing bowl (or glass measuring cup with a spout)

Measuring cups/spoons

Bath bomb molds (or muffin tin)

If gifting: Plastic molds you can give away or plastic used for shrink wrapping

Rubber gloves


1 cup baking soda

1/2 cup citric acid

1/2 cup Epsom salt

1/2 cup cornstarch

Powdered all-natural food coloring

2 1/2 tablespoons almond oil – or melted coconut oil

3/4 tablespoon water

12-15 drops of essential oil

Bath bomb molds


The process of making bath bombs is pretty straightforward and relatively easy. 

  1. Whisk together the cornstarch, Epsom salt, baking soda, citric, and food coloring. If you’re planning on selling it, be sure not to use gel food coloring because some countries still don’t approve of that for cosmetic products.
  2. Now you need to combine the melted coconut oil, and water, and the essential oil of choice. We use 12-15 drops of essential oil, but in case you aim for a stronger scent, you can add more. Just make sure to not add too much, as this may cause your bath bomb to expand later on.
  3. Now very slowly drizzle liquid ingredients into dry ingredients until they combine entirely. You should aim to have a consistency that is similar to dry, crumbly sand. If your mixture is too dry, the bath bomb will crack. On the other hand, if it’s too wet, your mixture will not stick together, and even if it does, the bath bomb will sink when used, which is a big turn-off. So it’s really important to find that right consistency.
  4. It’s time to carefully pack the bath bomb mixture into each side of your mold, gently push it, and let it dry. You can leave your bath bombs to dry overnight, which is fine, but in case you’re in a hurry, there are ways to dry your bath bombs quickly and safely. Many people use the oven to dry their bath bombs.
  5. Lastly comes packaging and wrapping. The one thing to remember is to make sure to let your bath bomb dry long enough before you start wrapping them. Wrapping them too soon might cause your bath bomb to fizz prematurely. Also, if you opt to air dry them, make sure not to leave them to dry where the humidity is more than 40%. This will cause your bath bombs to go flat
  6. You can label your bath bombs if you’re on planning on selling them and shipping them. A good tip is to use eco-friendly wrapping, which is loved by many customers. 

TIP: If you wish to make a bath bomb that fizzes longer, changing the ratio of critic acid and baking soda (which is 2:1) should do the trick. Making your bath bomb harder by lowering the moisture ratio or adding kaolin clay helps if you want your bath bomb to fizz longer. Also, some people like to use Glycerin in their bath bombs which are fine, but if you live in a humid environment, your bath bomb might start fizzing prematurely.


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