What’s better than adding a bath bomb to your tub? Adding multiple mini bath bombs! These Key Lime Mini Bath Bombs are made with plenty of glitter and scented with the Key Lime Tart Fragrance Oil. They smell just like delicious key lime pie. Of course, I colored them with Key West Lime La Bomb Colorant to complement the tart scent.
The shapes are created with the Small Cubes Mold and Package. The bath bomb mixture is pressed into the mold. Once hardened, the bath bombs are broken apart into small cubes. I love the somewhat “rustic” shape it gives. Using a bath bomb mold with two halves (like the Stainless Steel Bath Bomb Mold) can be a little tricky at first, so this project is perfect for beginners. It’s also a fun project to make with kids. My kiddos love mixing the ingredients together and washing the bowl with the leftover mixture. They never get tired of the fizzing reaction!
The Key Lime Tart Fragrance Oil does contain vanilla, which causes discoloration. In bath bombs, discoloration is rather inconsistent and hard to predict. We found that the fragrance did discolor these bath bombs slightly. If you look closely at the photos, you can see faint, tan spots. The discoloration is minimal, and the green color still shines through.
What You’ll Need:
Small Cubes Mold and Package (10 molds)
2 cup Baking Soda
1 cup Citric Acid
Fine Iridescent Glitter
5 mL Key Lime Tart Fragrance Oil
Key West Lime La Bomb Colorant
Witch Hazel in Spray Bottle
Dropper
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ONE: In a bowl, mix together 2 cups of sodium bicarbonate and 1 cup of citric acid. If there are any clumps in the mixture, you can push the powder through a sifter or break up the clumps with your fingers. Citric acid has a tendency to take off nail polish, so wear gloves to protect your manicure. =)
TWO: Begin adding drops of the Key West Lime La Bomb Colorant. I used about 6-8 drops of the colorant, but feel free to add more if you’d like a more saturated color. Use your hands to mix the color in with the dry ingredients.
THREE: Add the Key Lime Tart Fragrance Oil. Use your hands to completely mix in the fragrance, making sure there are no clumps of fragrance in the mixture.
FOUR: Add the Fine Iridescent Glitter and mix in.
FIVE: Check the moisture level of your fizzies. When squeezed with your hand, the mixture should hold its shape. If not, add spritzes of witch hazel, mixing between every couple sprays, until it has a texture similar to wet sand.
SIX: Once you have the correct texture, fill each mold with bath bomb mixture. Press the mixture firmly into the mold to pack it in. You can also fill in the individual cube cavities if you don’t want the rough edges once the cubes are broken apart.
Allow the bath bomb mixture to harden in mold with the lid off overnight. Once they have dried, press the back of the mold to remove them. They will naturally break apart while unmolding, but if not, use your hands to break them apart. They can be stored in the mold, or placed in a bail jar until you’re ready to use.
- Small Cubes Mold and Package (10 molds)
- 2 cup Baking Soda
- 1 cup Citric Acid
- Fine Iridescent Glitter
- 5 mL Key Lime Tart Fragrance Oil
- Key West Lime La Bomb Colorant
- Witch Hazel in Spray Bottle
- Dropper
- In a bowl, mix together 2 cups of sodium bicarbonate and 1 cup of citric acid. If there are any clumps in the mixture, you can push the powder through a sifter or break up the clumps with your fingers. Citric acid has a tendency to take off nail polish, so wear gloves to protect your manicure. =)
- Begin adding drops of the Key West Lime La Bomb Colorant. I used about 6-8 drops of the colorant, but feel free to add more if you’d like a more saturated color. Use your hands to mix the color in with the dry ingredients.
- Add the Key Lime Tart Fragrance Oil. Use your hands to completely mix in the fragrance, making sure there are no clumps of fragrance in the mixture.
- Add the Fine Iridescent Glitter and mix in.
- Check the moisture level of your fizzies. When squeezed with your hand, the mixture should hold its shape. If not, add spritzes of witch hazel, mixing between every couple sprays, until it has a texture similar to wet sand.
- Once you have the correct texture, fill each mold with bath bomb mixture. Press the mixture firmly into the mold to firmly pack it in. You can also only fill in the cube cavities if you don’t want the rough edges once the cubes are broken apart.
- Allow the bath bomb mixture to harden in mold with the lid off overnight. Once they have dried, press the back of the mold to remove them. They will naturally break apart while unmolding, but if not, use your hands to break them apart. They can be stored in the mold, or placed in a bail jar until you're ready to use.
This was so much fun to make, and so easy! I’ve never made anything like this before. My pedicure clients flip out over it. Thank you!
You’re welcome, so glad they’re enjoying it. 🙂
For the printable version of the recipe, the measurements in the directions and the measurements in the ingredients section don’t match. For instance, the ingredients say 2 cups of baking soda, but the directions say 1 cup.
Good catch Jerimi, thank you. We updated the recipe card to match the blog post.
I would like to use this project for my daughter’s upcoming birthday party. What do you recommend as far as steps that I can do in advance vs those that I can have the kids do at the party?
Also, approximately how much of the finished mix will fill 1 tray? I’m thinking of letting the kids make batches of different colors so they can be creative.
If you like you can premix the citric acid, baking soda, and glitter. Then the kids can add the liquid ingredients like color and witch hazel. This post has more tips for throwing a DIY craft party: https://www.soapqueen.com/bath-and-body-tutorials/tips-for-throwing-a-holiday-craft-party/
That one focuses on scrubs, but the tips work for bath bombs too. The recipe makes about 40-50 bath bomb pieces, which is about 8 cube molds. So, about 1/8th of the mixture fills one tray.
-Kelsey with Bramble Berry
I followed this recipe and found the fragrance smell overpowering! Does it lessen? These are my first bath bombs. Thanks.
The smell will stay fairly strong. However, because the bath bomb is essentially diluted in a large tub of water, it shouldn’t be too strong. For your next batch you can add less scent. Just add a few drops, smell, and add more until you get the scent level you like. 🙂
-Kelsey with Bramble Berry
Sorry for the millionth question, but would I add SLSA to this recipe? I love this base recipe but if I can find a way to add epsom salt, coconut oil and SLSA that would be amazing!
You can add SLSA, Epsom salt and coconut oil if you like! I would recommend adding 1 cup of SLSA and starting with 1/4 cup of Epsom salt. Epsom salt absorbs moisture from the air and can make the bath bombs too wet, so you’ll want to use a smaller amount, especially if you live in a humid climate. As for the coconut oil, you can add .5 oz. per 1.5 cup of fizzy mixture. 🙂
Learn more about adding ingredients to bath bombs here: https://www.soapqueen.com/bath-and-body-tutorials/bath-bomb-questions-answers/
-Kelsey with Bramble Berry
SLSA: https://www.brambleberry.com/Sodium-Lauryl-Sulfoacetate-SLSA-P5244.aspx
Epsom salt: https://www.brambleberry.com/Epsom-Salt-Extra-Fine-P5120.aspx
Coconut oil: https://www.brambleberry.com/Coconut-Oil-P3196.aspx
Can you add coconut oil to this recipe? If so how much would you suggest and should I adjust any of the other ingredients?
You can add coconut oil! We recommend .5 oz. per 1.5 cups of fizzy mixture. That helps add moisturizing properties and also helps wet the bath bombs. So, you may find you need less witch hazel when you’re making them. After you’ve added the coconut oil, squeeze the bath bomb mixture in your hand. If it holds together when released, you don’t need any witch hazel! If not, add 1-2 sprays, mix and test again. Repeat that process until it holds its shape. You’re looking for a texture similar to wet sand. 🙂
-Kelsey with Bramble Berry
Coconut oil: https://www.brambleberry.com/Coconut-Oil-P3196.aspx
can you use a silicone mold instead of the plastic mold since they are currently sold out?
You can use a silicone mold for these bath bombs! This Petite Bendy Star Mold would work really well: https://www.brambleberry.com/Petite-Bendy-Stars-Soap-Mold-P4734.aspx
Find more silicone molds here: https://www.brambleberry.com/Silicone-Molds-C548.aspx?ps=12&p=0
-Kelsey with Bramble Berry
Can you please tell me how to get rid of essential oil smell from silicon and plastic moulds please? Got some I’ve used for bath bombs but would like to re-use for chocolates. Thank you. Great blog x
Rubbing alcohol is really helpful for getting rid of smells! Spray the alcohol liberally on your molds and let that sit for 30 minutes. Then, wipe it off with a clean paper towel and wash with warm water and dish soap. You may need to repeat this process several times. If you find it’s still scented after a couple washes – don’t worry. We’ve found that smell doesn’t transfer to your next batch. 🙂
-Kelsey with Bramble Berry
Can’t do this on a rainy day. I made some and before I could get them to the dehumidifying room they were expanding. First time this has ever happened to me.
The humidity will definitely affect bath bombs! On more humid days, you’ll probably end up using less witch hazel. A great way to check is to squeeze the mixture in your hand. If it holds it shape, you don’t need any witch hazel that day! If not, spray 1-2 times, mix and test again. Repeat that process until the mixture holds its shape. Then, when the bath bombs are dry, wrap them in plastic wrap to protect them from moisture in the air and pop them in your dehumidifying room. 🙂
Bath Bomb Questions and Answers: https://www.soapqueen.com/bath-and-body-tutorials/bath-bomb-questions-answers/
-Kelsey with Bramble Berry
I made this recipe today and only managed to fill 3 of the tart moulds, with a little bit extra – approximately 20 small cubes altogether. The recipe says it makes 60….so not sure what happened there! I definitely measured it all correctly.
Hi Lisa! We double checked those amounts, and you’re totally right. It looks like we made a mistake while taking recipe notes, I’m so sorry about that! We updated the recipe. The good news is the bath bombs you made are perfectly fine, you can just make another batch to get the amount listed above. Sorry for the inconvenience!
-Kelsey with Bramble Berry
I liked the smell and feel of these but I found mine did not have that bath bomb fizz that they normally do when store bought. Would you think this is due to to much moisture when mixing or do these just have less fizz?
We’ve found these fizz really well! Do you live in a fairly humid climate? If so, the bath bombs can react with moisture in the air. That means they can fizz early and won’t as much in the tub.
-Kelsey with Bramble Berry
It was a very damp day here when I made them I have made another batch after running my dehumidifier for a a few hours before hand. Thanks for the tip.
You’re welcome! On damp days, adding less witch hazel can help. That will prevent the bath bombs from getting too wet. If the mixture holds its shape when squeezed, you can mold right away! If not, spray witch hazel 1-2 times, mix and test again. The dehumidifier will really help as well. 🙂
-Kelsey with Bramble Berry
I have some orange wax, could i use that instead of the fragrance oil?
Orange wax may be tricky to work into this recipe. It can give the bath bombs an odd consistency, and may not melt fully in the tub. I would recommend using fragrance or essential oils instead. You can use any skin safe fragrance you like. 🙂
Fragrance oils: https://www.brambleberry.com/Fragrance-Oils-C161.aspx
Essential oils: https://www.brambleberry.com/Essential-Oils-C157.aspx
Fragrance Calculator: https://www.brambleberry.com/Pages/Fragrance-Calculator.aspx
-Kelsey with Bramble Berry
Cute idea, I like the little individual bombs like that – I make toilet bombs in that way – though I’d skip the glitter. A tub and body full of glitter can’t be amusing…. I admit I am just no good at doing the two part bath bomb so I have taken to making them in any variety of molds, certainly a lot easier.
These bath bombs would work well without glitter too! The mold makes them nice and easy to make and store. 🙂
-Kelsey with Bramble Berry
Wow .. You amaze us every day .. Love all your work .. God bless you more & more
Thanks so much Mary, glad you’re enjoying the blog! 🙂
-Kelsey with Bramble Berry