How To Make Bath Bombs: The Ultimate Guide

We use affiliate links. If you purchase something using one of these links, we may receive compensation or commission.


Have you ever wondered how to make your own bath bombs? I love shopping at Lush. Having a nice relaxing bath with a nicely colored and scented bath bomb is one of my favorite things. They are just so very expensive. I figured I could make them myself. I actually make and sell them in my online store .

When I started making them, I was very overwhelmed. There are so many different recipes and they are not as easy to make as many of the diy articles state. I struggled. This article will go over the recipe that I landed on that works every time, why I choose some of the ingredients that I do, how to get a properly formed bomb each time and all the steps needed. This is your ultimate guide to making your own bath bombs. Now you can make them and have fun doing it. I hope that this saves you some of the stress that I went through.


  • 1 Cup of Baking Soda (Sodium Bicarbonate)

  • 1/2 Cup of Citric Acid

  • 1/4 Cup of Kaolin Clay

  • 1/4 Cup Cornstarch

  • 3 Tablespoons of Coconut oil (melted but not hot)

  • 1 Teaspoon of Polysorbate 80

  • Mica Powder (Color of your choice)
  • 1 Teaspoon (plus a splash) of essential oil or Fragrance oil of your choice

Other recipes call for water or witch hazel. I don’t like to use those recipes. It is very difficult to tell how much to use. If you use too little, you risk having a crumbly bath bomb that doesn’t set. If you use too much, the liquid can activate the ingredients. If the ingredients are activated, the bomb can start to grow in the mold or stick, thereby ruining all of your hard work. I like using the oils only. This ingredient mixture creates the correct amount of moisture so that the bomb easily comes out of the mold, sets, and activates when placed in the bath. It is a great combination.

The polysorbate 80 is used to keep the mica powders from staining the tub. This is a very important ingredient if you love to have vibrant bath bombs. Go crazy with your mica powder colors and layering.

The kaolin clay and cornstarch mixture makes a very soft and moisturizing bath when the bomb dissipates in the water. It also helps to create a sturdy bath bomb that holds it’s shape. It is a fantastic ingredient.

The citric acid is the active ingredient used in this recipe. The video at the bottom of the article shows what this bath bomb recipe looks like when placed in water. Citric acid can be hard on nails and skin. Use gloves when using this ingredient.


  • Large Bowl For mixing
  • Strainer or Whisk
  • Measuring cups/ spoons
  • Small bowl (if using more than one color)
  • Bath Bomb Molds (* see note)

You can purchase many different kinds of bath bomb molds. I have tried, silicone, plastic, aluminum and stainless steel. They all have different price points. I find that the stainless steel molds are the absolute best. I had mentioned earlier that if the ingredient mixture is off, that the bath bomb can stick in the mold. This is true as well if you have an inferior mold. The stainless steel makes it much easier to shape and unmold the finished product.


  1. Mix all of the dry ingredients together. I use a wire whisk to make sure to get all of the clumps out. If you leave any in, they will turn to hard stones when you add the liquid ingredients. Make sure that you thoroughly mix. If you prefer, you can use a strainer during this step to ensure that all lumps are gone.

2. Mix the liquid ingredients together in a separate bowl.

3. Slowly, very slowly, dribble the liquid ingredients into the dry ingredients. Start with half and mix in by hand (wearing gloves). Make sure to thoroughly mix the wet ingredients in. Use your hands to work through any clumps.

4. When all ingredients are mixed in, the mixture should be the consistency of wet sand. It should wipe off of your hands easily but, it should hold shape when squeezed into a ball in your hand.

5. This is the point where you can add the mica powder if you plan to use any. If you plan to layer different colors, take your white mixture and separate even amounts into different bowls and mix the colors into those bowls. (I did not add color to this tutorial).

6. Now it is time to put your ingredients into a mold. As stated above I use the stainless steel molds. For this tutorial, I added dried flowers to the bath bombs for a nice addition and looks.

In this step, you take one half of a mold and press the ingredients into it. If you plan to place any type of adornment into the mold, it will be placed into the mold first. If you are layering colors, you will press one color in, then press the other colors at your discretion. Once one half mold is full, repeat the process with the other.

7. Once you have both halves of the mold filled and pressed in, make sure that you have extra product on each. You will want enough to “smoosh” out when you push the two halves together.

Push the two halves together. You can twist slightly. Do NOT twist too much. You want the two halves to adhere together. Make sure to clear any extra product off of the sides and make sure that both sides are firmly pressed together. Set aside.

8. Repeat the process until all product is used. This should yield Three large bath bombs and one small.

9. A lot of recipes state that you should let the bath bombs sit in the molds for a day or two before removing. This is where I disagree. I remove them after a few minutes. You have to be very careful. They are not set yet and are very capable of crumbling (but guess what? If they do, you can remold them). Take the end of a knife and lightly (while holding the mold together firmly) tap the mold starting on the sides then on the top and bottom. You should hear the sound of the tapping change a little. This is when you will know the bath bomb has released from the mold. Remove one side at a time very carefully and place on a paperplate or sometime safe to set for at least one day before packaging or storing.

I find that having air and letting the bath bombs set in this method makes them sturdy and ready to use. Plus, they are much easier to remove from the mold.


There you have it!! The finished product. You are now on your way to making the best bath bombs ever!!! I hope that you have enjoyed this tutorial. Check out the video below to see your handiwork.

Leave a Reply

Your email address will not be published. Required fields are marked *