Back at it again with another bath bomb project! This time, I’ve made cupcake bath bombs and they are the cutest! This Cupcake Bath Bomb DIY is a little more complicated than just making regular spherical bath bombs because these cupcakes are made in two phases. If you want to stick to making regular bath bombs, check out Make Your Own Lush Inspired Bath Bombs.
Bath Bomb Recipe:
- 1 C. Baking Soda
- 1/2 C. Citric Acid
- 1/2 C. Epsom Salt
- 1/2 C. Corn Starch
- 2 1/2 tbsp. Almond Oil
- 3/4 tsp. Water
- 1 tsp. Essential Oils (i used Vanilla for a cupcake scent)
Other Items You Will Need:
- Food Coloring
- Mixing Bowls
- Cupcake Baking Pan
- Silicone Cupcake Liners
- Silicone Swirl Mold
- Small Spray Bottle
- Gold Lustre Dust (optional)
- Cupcake Sprinkles (optional)
For the cupcake part of bath bomb, sift all of the dry ingredients together in a large bowl. In a separate bowl, combine all of your wet ingredients, excluding any food coloring.
Little by little, combine the wet ingredients into the dry ingredients and mix thoroughly. It’s important to combine the wet ingredients little by little so that the mixture does not react. If the mixture does react, then the bath bomb texture can be bumpy and they won’t fizz as well in the bath. See what I mean in my original DIY Bath Bomb post.
Once your bath bomb mixture is the consistency of wet sand, you can add the food coloring to the mixture. If you are wanting more than one color for the “cupcake” part of the bath bomb, you can split up the mixture into separate bowls and add your color to each bowl. This recipe will fill eight (8) silicone cupcake liners. I split up the bath bomb mixture and used a few different colors for the cupcake part and also made some without any food coloring. Once you’re done combining the food coloring you’re ready to mold your bath bomb into the silicone cupcake liners. For more detail about making the bath bomb mixture, see my original bath bomb post.
Place your liners into a cupcake baking pan for added stability and use a spoon/scoop to fill up each liner with the bath bomb mixture. Be sure to pack it in with the back of a spoon or flat object. I was surprised how much could fit in each little liner. The bath bomb will crumble if it’s not packed in firmly, so pay special attention to the edges and press everything down evenly.
Set the cupcakes aside to harden in the baking pan — do not remove from the molds — to me, this is the key when using silicone mold for bath bombs. The cupcake bath bomb should dry completely in about 48-72 hours. I waited about three days just to be sure that everything had hardened.
Now to phase two of these super fun cupcake bath bombs — the frosting! All of the cupcake bath bombs I’ve seen have use meringue as the frosting which can be piped out and looks like real frosting, but the idea of sitting in a bath with a plop of meringue kind of grosses me out. Especially since the meringue does not fizz away; it just floats there….awkwardly. Anyway, I thought it would be amazing to have the frosting part be another bath bomb! After much trial and error, I’ve figured out how to make these two bath bombs combine to one awesome cupcake bath bomb.
So, to make the frosting part of the bath bomb, make another batch of the bath bomb recipe in the same way as before — carefully combining the wet ingredients so as not to cause a reaction. The bath bomb recipe will fill a tray of six (6) frosting molds.
Split up your mixture and add your food coloring just like before. Then, fill up the frosting-shaped swirl mold with the bath bomb mixture and pack it in with the back of a spoon. You can place some sprinkles in the bottom of the mold before packing in the mixture if you choose to give it more of a cute cupcake-look. Again, pay special attention to press the bath bomb mixture firmly into the mold so it won’t crumble at the edges when removed.
Once your frosting tray is filled, we are ready to combine the cupcake part and the frosting part!
Take your small spray bottle and fill it with the wet ingredients of the bath bomb mixture — the water, almond oil, and essential oil (optional). Give the mixture a good shake to combine the ingredients and then spray a few squirts onto the hardened cupcake bath bomb. The bath bomb will slightly start to react. Quickly, press the hardened cupcake part onto the top of the still “wet-sand-like” frosting part to stop the bath bomb from reacting and to “glue” the two pieces together.
Continue this process until each frosting piece has a cupcake piece pressed firmly on top. I then placed a boxed board game and my computer on top to hold the bath bomb in place while they dry ~48 – 72 hours.
Once bath bomb is completely dry, slowly remove the frosting part from the silicone mold. The bath bomb should release freely, but you’ll want to take care not to let any of the edges crumble.