How to Make a Donut Bath Bomb

how to make a doughnut bath bomb with frosting

Lets talk about making a donut bath bomb. This bath bomb is another one of those interesting designs because like a real donut, you can get very creative with them, putting together all sorts of cool toppings to make your design unique.

There are many molds out there you can also purchase, but we are going to talk about our favorite ones which makes molding these doughnut bath bombs a breeze.

If you don't know or would like to learn more about bath bombs, ingredients or bath bomb colors used in basic bath bombs recipes, head on over to our blog where you can learn more about them today.

diy bath bomb donuts

We don't know who the first company was to think of donut bath bombs, but man have they become popular. Anyone who sells bath bombs usually has there own unique donut bath bomb in there arsenal, but rather then purchasing one of these bombs, why not have a little fun and try them yourself?

There are 2 parts to this process; one is creating your actual bath bomb using a donut mold, and the second is developing a topping recipe that you can pour, sprinkle or spread over the top of the finished bath bomb.

The topping serves multiple purposes as well. It creates a unique looking bath bombs, but also with our recipe (ingredients) adds more smoothness to your skin, added scent, and foam to the finished product, once dissolved in a warm bath.


  • Mixing Bowl
  • Measuring Cups
  • Measuring Spoons
  • Whisk
  • Pipette
  • Gloves
  • Goggles
  • Eye-wear
  • Medicine cups (3)
  • Doughnut Mold (CadaSoapery)
  • Spray Bottle

Ingredients for the Bath Bomb!

  • Baking Soda - 2 Cup (500 grams)
  • Citric Acid - 1 Cup (200 grams)
  • Sodium Lauryl Sulfoacetate (SLSA - This makes the foam) - 2 TBSP
  • Kaolin Clay - 1 tsp
  • Corn Starch - 1/2 TBSP (5 grams)
  • Sweet Almond Oil - 1 TBSP (5 grams)
  • Polysorbate 80 - 1 tsp (5 grams)
  • Birthday Cake Fragrance - 10 grams
  • Color of Choose (Pink Mica in this case) - 1 tsp or to your desired color
  • Half Water/Alcohol Mix in spray bottle

diy bath bomb donuts

Recipe for the Bath Bombs

Step 1:
Measure all of your ingredients carefully using a scale.

Step 2:
Separate all of the dry ingredients into one bowl and the wet ingredients into your 2nd bowl. Your dry ingredients include baking soda, citric acid, corn starch, kaolin clay, SLSA & your Mica.

Your wet ingredients includes your fragrance, sweet almond oil & Polysorbate 80.

Step 3:
Put on your gloves and mask, pour the wet ingredients into the dry ingredients and start to mix right away. If you don't mix fast, the chemical reaction will begin to occur between the ingredients, in which you will see foaming/fizzing occurring.

Read more about Common Bath Bomb Failures!

Step 4:
Start mixing with your hand to break up any clumps in the mixture, you should aim to buy ingredients that are fine grain, this will make the process easier and give better consistency.

After breaking up any clumps you can use a hand mixer to help expedite the process.

Step 5:
At this time your mixture may be slightly damp from the wet ingredients, however it will most likely not be the consistency for molding yet.

Step 6:
Grab your spray bottle and add 5 sprays into the mix and continue to mix immediately, don't hesitate, the more reaction that occurs at this phase the less will occur in the tub.

Step 7:
Test your mixture.

How do I test it?

Grab you mixture in your hand and squeeze it. If it does not stick to your hand and stays formed it is most likely ready, but you can also try the drop test. (This test requires you to repeat the above step, and then drop the mixture from 6-8 inches into the bowl, and if it stays together it is ready to be molded).

Step 8:
Repeat step 6 if not wet enough. It should feel like damp sand. Not wet, just damp.

Step 9:
Grab your mold, overfill each side of the mold and press together tightly, do not twist together to much, you really just want to press firmly together.

Step 10:
Tap on your mold after about 5 - 10 seconds of pressure, and lift the top mold. Tap the bottom part of the mold and tip over the rest of the bath bomb into you hand.

Continue until you have used up all of your ingredients.

Now that you have a handful of donut bath bombs, next comes the fun part, the TOPPINGS!

donut shaped bath bombs

Ingredients for the Topping!

  • Shea Butter (odor free, refined shea butter)
  • Colorants (we will be using red, pink and white mica)
  • Birthday cake fragrance.
  • Add colorful sprinkles (optional)

Creating your Topping Drizzle

Step 1:
Melt your Shea Butter, just until it is liquefied. Shea butter melting point is about 90 F - 100 F degrees.

Step 2:
Pour a small amount of melted butter in 3 separate medicine cups.

Step 3:
Add a 1/4 tsp of each of your mica colors to your different Shea butter medicine cups.

Step 4:
Stir them well, a small mini mixer works wonders for this. Add a few drops of birthday cake fragrance to each cup (too liking) and mix again.

Step 5:
Using your pipette, suck up one color at a time and lightly squeeze the color as your pass back and forth over your donut bath bombs.

donut shaped bath bombs

This is how you can create your own DIY donut bath bomb. This is a fairly straight forward process, but if you're an experienced bath bomber, there are many other more complex recipes out there.

Thanks for coming by our blog, and be sure to share our recipes across your social media platforms. Have a great day!

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