DIY Bathtub Bombs Ideas & Tips!

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On this submit I’m going to present you step-by-step directions on the best way to make your personal diy bathtub bombs! This do-it-yourself bathtub bomb recipe is tremendous simple to make and so enjoyable to make use of! Create a spa-like expertise with a pleasant heat bathtub, a glass of wine and do-it-yourself fizzy bathtub bombs!  This enjoyable bathtub bomb venture accommodates simple to seek out, pure components that come collectively for an expensive bathtub time expertise. 

Large jar with bath bombs

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Ever had a kind of DIY makes an attempt the place all the pieces went mistaken and what was presupposed to be simple became a 2 day lengthy ordeal? That is the way it went with studying to make my very own bathtub bombs. First I used to be unprepared with components and didn’t have sufficient citric acid. Then I didn’t have sufficient corn starch. Subsequent, I rapidly found I purchased the worst molds! I re-made and re-worked my DIY bathtub bombs 3 instances! Let’s simply say, I realized numerous what do to do and what to not do! I employed my daughters helps since they’re dwelling for the summer season as properly so between the three of us, we obtained bathtub bombs discovered and have all the ideas and methods so you may make the proper bathtub bomb with out the trial and error!

The Science Behind Bathtub Bombs:

The two components it’s essential to have to be able to make your personal bathtub bombs are citric acid and baking soda. A chemical response happens between these 2 components and it’s essential to have them each. All different components usually are not 100% mandatory.

According to Live Science

The fizziness of bathtub bombs comes from the chemical reactions that occur when the baking soda and citric acid come into contact with water, Wooden-Black informed Stay Science. Baking soda, or sodium bicarbonate, has the chemical components NaHCO3. In water, baking soda rapidly dissolves, and the positively charged sodium (Na+) breaks aside from negatively charged bicarbonate (HCO3-). [Goopy Science: How to Make Slime with Glue]

In the meantime, the citric acid additionally dissolves, with a single hydrogen ion (H+) separating from the remainder of the molecule, Wooden-Black stated. Then, that positively charged hydrogen from the citric acid and the negatively charged bicarbonate from the baking soda mingle, in a short time present process a sequence of reactions. One of many finish merchandise is carbon dioxide (CO2). As a result of carbon dioxide is a gasoline, it varieties small bubbles within the bathtub water, creating a pleasant fizz.

To make bathtub bombs, it’s essential to use 1 half citric acid to 2 elements baking soda. For instance, if you happen to use 1 cup of baking soda, you’ll want 1/2 cup citric acid. 

Additionally, per 2 cup of dry components add about 1-2 teaspoons of liquid. On this bathtub bomb recipe, it’s essential to add the liquid slowly checking to get the precise consistency. You wish to barely moisten the combination in order that the powder sticks collectively. Nevertheless, don’t fret if you happen to get an excessive amount of liquid-just add extra baking soda! 

Different DIY Bathtub Bomb Components:

Epsom Salt is a pure ingredient so as to add to your bathtub for mineral absorption and detox. 

Cornstarch in a shower bomb merely slows down the response between the baking soda and citric acid. By binding to the baking soda in addition to the citric acid, the cornstarch slows down the speed at which each of them dissolve. The cornstarch prolongs the bathtub bomb motion. The fizziness may find yourself lasting 2-4 minutes quite than just a few seconds!

Bath bombs on white background

I made 3 totally different batches with totally different important oil combos, totally different colours and totally different dried herbs. I added lavender buds to the purple bombs and chamomile flowers and rose petals to the yellow bombs. You’ll be able to sprinkle herbs on the underside of your mould so they’re seen on the completed bomb or you possibly can combine them into your combination so they’re a shock as soon as they hit a heat bathtub!

Simply keep in mind no matter you set in your bathtub bomb has to go down the drain!

Get inventive and add your personal private contact! This straightforward bathtub bomb recipe would make an amazing present!!

You is perhaps concerned with my DIY Firming Physique Oil recipe. It’s the proper physique moisturizer for after the bathtub!

DIY Bath Bomb Ingredients

What You’ll Have to Make DIY Bathtub Bombs


  • 1 cup Baking Soda
  • 1/2 cup Citric Acid
  • 1/2 cup Epsom Salt
  • 1/2 cup Cornstarch
  • 1-1 1/2 teaspoon coconut oil
  • 1-1 1/2 teaspoons water
  • 10 drops important oil of your selection *elective
  • 2-4 drops meals coloring *elective
  • Dried herbs or petals *elective


  • Metallic Bathtub Bomb Molds
  • Giant Bowl
  • Small Bowl, cup or jar
  • Whisk


    1. Add baking soda, citric acid, Epsom salt and cornstarch in a big bowl.
    2. Combine dry components properly.
    3. Soften coconut oil in a double boiler (fill a medium sized pot half manner full with water and gently warmth your coconut oil on medium warmth)
    4. In a separate small bowl or jar, add moist components together with meals coloring and important oil.
    5. Combine your liquid components properly till the colour and important oils are evenly dispersed.
    6. SLOWLY add the liquid combination into the dry combination stirring your complete time. We do not need the citric acid to get activated by the liquid.
    7. Test that your remaining combination clumps collectively. Suppose-wet sand. However do not get too moist! We simply need to have the ability to clump the combination collectively when compacted.
    8. Utilizing stainless-steel molds, pack within the combination into every mould half.
    9. Sprinkle additional bathtub bomb combination loosely on high of the molds and press combination within the molds collectively.
    10. Twist and take away molds. Faucet the mould to loosen the bathtub bomb for simpler elimination.
    11. Place bombs on parchment paper and permit to dry for 24-48 hours.

    Bowl of dry ingredients

    Dripping food coloring in small jar of liquid

    Pouring liquid into white powder mixture

    Hand clumping white powder

    Hands putting mixture into a mold


  • It is very important notice that bathtub bomb making shouldn’t be achieved in a moist setting. This venture is just not the proper wet day exercise.
  • The shelf lifetime of bathtub bombs is 6 months. Citric acid will begin to lose it is fizzy energy after too lengthy.

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Mould Choices:

3 yellow diy bath bombs made from muffin tins

Colour Concepts:

*All the time add mica powder into your liquid since inhaling mica could be hazardous.

Scent Choices:

Jar of Bath Bombs by Bath Tub

Troubleshooting DIY Bathtub Bombs:

  • In case your bombs are too moist you possibly can add extra baking soda. 
  • In case your bomb is crumbling and never staying collectively, add extra moist components. Do that fastidiously. You’ll be able to fill a sprig bottle with water, witch hazel or alcohol and spray your combination to make sure you don’t add an excessive amount of water.
  • If the bomb fluffs up you’ve added an excessive amount of liquid or added liquid too quick.
  • If the bomb is comfortable, it wasn’t packed down sufficient or it was too moist.
  • If the bomb has bumps the moist and dry components weren’t blended properly sufficient.
  • If the bomb cracks down the center, it was not molded correctly. I heard that if you happen to shrink wrap it and wait 24 hours, it’ll come again collectively.
  • If the bomb sticks to the mould the combination was too moist.
  • If the bomb doesn’t float, it’s probably not dry sufficient. Bombs can generally take a number of weeks earlier than they’ll float.

More often than not you possibly can crumble up the bomb right into a bowl and tweak the combination. Not all is often misplaced if you happen to make a mistake with bathtub bombs! Don’t throw it out simply but!


As an alternative of coconut oil, be happy to make use of olive oil, almond oil, avocado oil, castor oil and so on.

I wish to omit cornstarch in my subsequent batch and am pondering of utilizing coconut milk powder as an alternative. From all that I’ve researched I’m positive it’ll work nonetheless, I haven’t tried it but.

So long as you retain the proportions of liquid to powder and don’t omit baking soda or citric acid, you possibly can mess around with components to be able to obtain totally different advantages and reactions out of your bombs.

A Few Bathtub Bomb Tips!

  • Strive utilizing castile cleaning soap as your liquid for many foamy bubbles!
  • For extra nourishment, use all oil on your liquid proportion.
  • Take about 1/4 cup of a tough butter like cocoa or kokum (dry, not melted). Cowl the butter with baking soda and finely chop the butter ensuring it’s coated in powder. Add it to your dry combination. Butter will soften in a scorching bathtub and provides additional nourishment for dry pores and skin!
  • You’ll be able to separate a batch into a number of smaller batches, add totally different shade to every batch and layer the totally different colours to make a beautiful bathtub bomb!
  • Utilizing a tablespoon to indent insides of each halves of the mould then fill the indention with one other coloured batch of bathtub bomb combine in order that once you use it, a shock shade is inside. 

Whereas I had a tough go of creating bathtub bombs due to the flimsy plastic molds, I’m planning to purchase the right steel molds and experiment extra. I discovered a Youtube channel referred to as Creative Bath Lab and he or she is the queen of all issues bath-especially bathtub bombs. She makes probably the most inventive good bathtub bomb each time!

Like I stated, what I assumed was going to be a straightforward do-it-yourself bathtub bombs venture turned out to be tough and cumbersome so I took to the web searching for solutions. This posts compiles all that I’ve realized. General, my daughters and I loved this DIY and might’t wait to make extra!

Take to the feedback when you’ve got your ideas or questions!!

xx, Jenni

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