Enchanting Blue Fairy Cupcake Bath Bombs Recipe and Science Lesson (2024)

These blue fairy cupcake bath bombs are simply magical! The best part is that you can make them your self with your kids and work in a fascinating science lesson, along with some life skills. Making your own bath bombs is incredibly satisfying and saves you so much money. Plus, you can gift a little magical fairy bath bomb into the day of someone who needs a little magic. How special is that?

Fairy Cupcake Bath Bomb Recipe and Science Lesson

What you will discover in this article!

Enchanting Blue Fairy Cupcake Bath Bombs Recipe and Science Lesson (1)

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Have you noticed we love making bath bombs? Especially with kids? Why? Well let me tell you!

I’ve discovered that one of the ways to empower kids and help them take ownership of their learning is by letting them have some say in the process. This means I need to provide ways of learning that are…. wait for it… interesting! For many kids that means getting hands on and active while learning.

I’m sure you’ve heard it before, but one of the best ways for kids to learn is by having fun and playing. By finding projects that ignite kids passions and creativity we can make lessons fun. And when they are having fun, they are learning in ways that will actually stay with them!

These are the lessons they will remember years from now.

Bath bombs offer unlimited creativity. There is a bath bomb idea for almost any passion, interest or fandom. You simply need to think it, and know a bit of the science and process of bath bomb making, to make it happen.

So far we have made Harry Potter inspired bath bombs, Halloween bath bombs, Dragon bath bombs, Christmas bath bombs and so many more!

This week we wanted a little magic. A sprinkling of fairy dust to make our day sparkle with happiness!

That’s how these blue fairy bath bombs came to be. All it took was a little creativity, a bit of passion and a dash of fairy dust magic.

Making Blue Fairy Cupcake Bath Bombs With Whipped Tri-Colour Icing Soap Topping

This is definitely what I would classify as a more advanced bath bomb making project. But once you start making bath bombs, especially with your passionate, highly creative teens I know they are going to embrace this challenge!

We did a similar bath bomb project when we made our Fiery Dragon Bath Bombs and our Glow in the Dark Cupcake Bath Bombs.

You will make these bath bombs in two stages. The first stage is to make the cupcake bath bomb base. Once this is made and hardened (which takes one or two days), you are ready for stage two. In the second step we make and apply the tri-coloured whipped soap icing and add sprinkles.

One of the things we love about these cupcake bath bombs is that the icing soap is great for cleaning yourself in the tub as it pops off quickly and easily in the water.

Plus they look amazing!

BLUE FAIRY Cupcake BATH BOMB RECIPE

To make 12 regular sized cupcake bath bombs you will need the following ingredients and tools:

1 1/2 cups baking soda
1 cup citric acid
1/4 cup Coconut Oil Epsom salts
1/2 cup cornstarch
1/4 cup Bentonite Clay
1/4 cup coconut oil
2 teaspoons polysorbate 80
1-2 drops of Ocean Breeze scented oil
2-3 drops blue soap colorant
Mermaid sprinkles
1 large mixing bowl
1 microwave safe cup or bowl
Muffin mold
Microwave
Disposable gloves (optional)

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Cupcake Bath Bomb Directions

In a large mixing bowl, add the baking soda, citric acid, Bentonite Clay, Epsom Salts and cornstarch. Mix the dry ingredients together.

In the microwave safe cup melt the coconut oil for a few seconds in the microwave until it is just liquid.

Add the Polysorbate 80, scented oil and blue colorant. Mix together.

Add the wet mixture to the large bowl of dry mix. Mix everything together. You will want to use your hands and may want to use disposable gloves so you don’t color your hands. Make sure you break down all the lumps and it is really well mixed. It will feel like wet sand once it is completely mixed.

If you want a darker color, add 1-2 more drops and mix well. Repeat until you get the color you want.

Using an ice cream scoop or spoon, fill each cavity of the muffin mold. Press down firmly. Add more until the cavity is filled to the top. (Note: in the pictures I used a muffin tin, but I discovered silicone molds work much better).

Set them in a warm, dry place to set up and harden for a minimum of 24 hours. You may need to wait 48 hours depending on your climate. My rule of thumb is that when it is hard to the touch, they are ready. Gently pop each bomb free of the mold once it is hard. You are now ready for icing!

Blue Fairy Tri-Color Whipped Soap Icing Recipe

Now it’s time to whip up some magical soap frosting! You will need the following ingredients and supplies:

1/4 cup clear or white melt and pour soap base
1 tablespoon glycerin
1 tablespoon corn starch
3/4 cup whipped soap base
2-3 drops each of pink, purple and teal soap colorant
Tri-color frosting kit
1 large mixing bowl
3 small mixing bowls
Mixer (regular or hand will work)

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DIRECTIONS TO MAKE WHIPPED TRI-COLOR SOAP BATH BOMB ICING

Add whipped soap base, scented oil and glycerin to mixing bowl. Mix on low speed until fluffy, or about 1 minute.

Melt your soap base in microwave safe bowl in 30-second intervals, stirring after each until melted. Allow to cool for about a minute.

Mix in melted soap base and cornstarch and mix on high speed for 1 minute or until the mixture forms peaks, like when you make a meringue. If your frosting is not stiff enough, add a bit more cornstarch and mix in. Repeat until the mixture is nice and firm.

Divide whipped soap into 3 small mixing bowls and add pink color to one bowl, purple to another and teal to the last bowl. Start with 1-2 drops of color and mix it in. If you want a darker color, add 1-2 more drops and repeat until you get the color you want.

Add one of each color frosting to each of the 3 piping bags. Hold bags together so all sides of the tips meet. Add frosting tip and the coupler.

Holding all three bags tightly in your dominant hand, frost cupcake bombs as you would an edible cupcake. Add a few candy sprinkles for your “fairy dust”. The sugar will easily melt in your warm bath water.

PRO TIP! After 2-3 days, your frosting will harden enough that you can easily remove it from the cupcake and use the soap once you have enjoyed your soak in the tub with your bath bomb!

Make sure you store your bath bombs in an airtight container until ready to use. I recommend using your bath bombs within a few months. After that time you may notice a decrease in the fizziness. But honestly, my kids can never wait that long! Bath bombs are just too much fun!

Bath Bombs SCIENCE Lesson

One of the most fascinating part of making bath bombs is the science! It is a wonderful way to engage even your most reluctant young scientist.

So first up, what happens when you mix oil and water?

I think everyone knows this answer from Kindergarten. The oil floats on the water because it is less dense.

What do you notice about the bath bomb ingredient list? Yup, lots of oil in there.

Now no one wants to have a bath where all the oils and colors float on the top in a layer of colorful scum. Sticking to everything it touches and generally making a big old mess. That’s not fun or relaxing for anyone! So what do we do?

We use an emulsifier known as polysorbate 80. This makes all those oils mix with our bath water turning it a gorgeous fragrant color that we want to relax in!

But what about that Bath Bomb Fizz?

Bath bombs fizz due to an acid-base reaction between the baking soda and citric acid. While in their dry, powdered form they will not react, but the moment you add water… BUBBLY FUN!

That’s why I say it is so important to make and set your bath bombs somewhere warm and dry. Any water exposure, even from humidity in the air, will start triggering a reaction.

There is much more cool science behind bath bombs, but those are a couple of the most interesting parts at play.

I hope you have a magical time making fairy bath bombs!

Enchanting Blue Fairy Cupcake Bath Bombs Recipe and Science Lesson (20)

MORE BATH BOMBS FOR KIDS

Enchanting Blue Fairy Cupcake Bath Bombs Recipe and Science Lesson (24)

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Blue Fairy Bath Bomb Recipe

A magical blue cupcake bath bomb making project

Servings 12

Supplies

Cupcake Bath Bomb Ingredients

  • 1.5cupsbaking soda
  • 1cupcitric acid
  • 0.25cupcoconut oil epsom salts
  • 0.5cupcornstarch
  • 0.25cupBentonite Clay
  • 0.25cupcoconut oil
  • 2tsppolysorbate 80
  • 1-2dropsOcean Breeze fragrance oil
  • 2-3drops blue soap colorant
  • Mermaid Sprinkles

Whipped Tricolor Soap Icing

  • 1/4cupmelt and pour soap base
  • 1tbspglycerin
  • 1tbspcornstarch
  • 3/4cupwhipped soap base
  • 2-3dropseach of pink, purple and teal soap colorant

Instructions

Making the cupcake bath bombs

  1. In a large mixing bowl, add the baking soda, citric acid, Bentonite Clay, Epsom Salts and cornstarch. Mix the dry ingredients together.

  2. In the microwave safe cup melt the coconut oil for a few seconds in the microwave until it is just liquid. Add the Polysorbate 80, scented oil and blue colorant. Mix together.

  3. Add the wet mixture to the large bowl of dry mix. Mix everything together. You will want to use your hands and may want to use disposable gloves so you don't color your hands. Make sure you break down all the lumps and it is really well mixed. It will feel like wet sand once it is completely mixed.

  4. Fill each cavity of the muffin mold. Press down firmly.

  5. Let set for 24 to 48 hours.

Whipped Tricolor Soap Icing

  1. Add whipped soap base, scented oil and glycerin to mixing bowl. Mix on low speed until fluffy, or about 1 minute.

  2. Melt your soap base in microwave safe bowl in 30-second intervals, stirring after each until melted. Allow to cool for about a minute.

  3. Mix in melted soap base and cornstarch and mix on high speed for 1 minute or until the mixture forms peaks, like when you make a meringue. If your frosting is not stiff enough, add a bit more cornstarch and mix in. Repeat until the mixture is nice and firm.

  4. Divide whipped soap into 3 small mixing bowls and add pink color to one bowl, purple to another and teal to the last bowl. Start with 1-2 drops of color and mix it in. If you want a darker color, add 1-2 more drops and repeat until you get the color you want.

  5. Add one of each color frosting to each of the 3 piping bags. Hold bags together so all sides of the tips meet. Add frosting tip and the coupler.

  6. Holding all three bags tightly, frost cupcake bombs as you would an edible cupcake. Add a few candy sprinkles for your "fairy dust".

Enchanting Blue Fairy Cupcake Bath Bombs Recipe and Science Lesson (2024)

FAQs

How do you make bath bombs that don't fall apart? ›

If your bombs crack after they're out of the mold, they're probably too wet. Use less liquid or if all else fails, try adding 1 teaspoon of kaolin clay per cup of dry ingredients. Clay absorbs moisture and will help your bath bombs hold their shape batter.

What are the ingredients for bath bombs? ›

Here's everything you'll need for the perfect bath bomb: 1 cup baking soda. 1/2 cup citric acid (as an alternative, use the same amount of either lemon juice, cream of tartar, buttermilk powder, or 1/4 cup each of baking powder and apple cider vinegar) 1/2 cup Epsom salt.

Can you use bentonite clay in bath bombs? ›

In a large bowl mix the dry ingredients: 1 cup baking soda with the citric acid, bentonite clay and beet powder. In a smaller bowl add liquid ingredients: jojoba oil, coconut oil, and essential oil, mixing well. Add 1 tsp. baking soda to your liquid mixture and continue mixing until well combined.

What does Epsom salt do in bath bombs? ›

The Epsom salt provides a detox in the bath, helping the body in its process of removing toxins and harmful substances from the cells, which also relieves muscle aches and pains.

Why use cream of tartar in bath bombs? ›

It helps to stabalise bubbles and can bulk out the citric element in bath bomb recipes or even replace completely. Cream of tartar is often chosen as an additive in formulations as it can help to harden products. Also added to toiletry products for it's 'creamy' feel.

What binds bath bombs together? ›

Bath bombs also tend to include food coloring and a binding agent that keeps the ingredients packed together in the molded shape. Often this is some type of oil, or other ingredient like witch hazel, isopropyl alcohol, or water.

What holds bath bombs together? ›

Bath bombs are made with 2 parts baking soda and 1 part citric acid. That causes the fizzing reaction when they're dropped in water. They typically need witch hazel to hold together. From there, you can customize them with colors, fragrances, and additives.

What can I use instead of witch hazel in bath bombs? ›

For professionals, it's quicker to weigh out isopropyl alcohol than it is to spritz it and isopropyl alcohol is cheaper than witch hazel. You can find it in most pharmacies. The alcohol will evaporate after 24 hours leaving you with a smooth, hard bath bomb.

What is the best liquid for bath bombs? ›

Liquid Crystal Dyes are perfect for bath bombs; they're highly concentrated, and you only need a few drops to color a batch of bombs! Less liquid means reducing the risk of the baking soda and citric acid reacting early. Colors can coat your skin or the inside of your tub.

Why are my homemade bath bombs falling apart? ›

Bath bombs crumble or fall apart if too little force or too much force is applied during the moulding process. They will also crumble if they are too wet when removed from the mould. Moreover, if the bath bomb mixture is too dry when formulated it may disintegrate on release from the mould.

Why do you put cornstarch in bath bombs? ›

Another ingredient that is often used in homemade bath bombs is cornstarch. This ingredient can act as a dry "filler" that gets mixed in with the reactive baking soda and citric acid in the bath bombs.

Can you use Epsom salts in bath bombs? ›

Homemade Epsom salt bath bombs

½ cup baking soda. ¼ cup corn starch. ¼ cup citric acid. ¼ cup Epsom salt.

Should you use cornstarch in bath bombs? ›

Well, cornstarch can have a lot of functions for bath bombs. They are commonly found in traditional recipes for good reasons. Cornstarch is a good hardener and scent fixative. However, one can still make a good bath bomb even without cornstarch.

What is the most important ingredient in bath bombs? ›

Two of the key ingredients to a bath bomb are citric acid and sodium bicarbonate. You might also know sodium bicarbonate by its more common name, baking soda. These two ingredients are what cause the impressive and delightful fizz when the bath bomb enters the water.

How do you make bath bombs with baking soda and water? ›

directions
  1. Mix together well a small amount of baking soda, food coloring and 10-20 drops of fragrance oil in a bowl.
  2. Add this mixture to the remaining baking soda, citric acid, and corn starch (and flower petals, if using).
  3. Mix well.
  4. Spritz the mixture with water while mixing with your hands.

What is the best ratio for bath bombs? ›

Bath bombs are generally made with an approximately 2:1 ratio of baking soda: citric acid, though I've found that a 2.25:1 ratio is also acceptable and cuts your costs a bit. Baking soda is readily available from the grocery store.

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