Learn how to make bath bombs at home. Homemade bath bombs are easy to make and are great for DIY gift giving.
Crafting Time30 minutesmins
Dry Time8 hourshrs
Total Time8 hourshrs30 minutesmins
Age Group: Adult Crafts, Kids Crafts
Project Type: Crafts
Makes: 3round bath bombs
Supplies
1cupbaking soda
1/2cupcitric acid
1/2cupEpsom salt
1/2cupCorn Starch
2 1/2Tbspcoconut oilMelted
3/4Tbspwater
8-15drops essental oils
Bath Bomb moldssee notes under craft tips
Optional: Food grade dried lavender flowers or fresh rosemary
Liquid coloring for soap
Craft tools
Medium size mixing bowl
Small glass jar
Spoon
Whisk or fork
Measuring cup
Measuring spoons
Baking sheet with sides
Instructions
Combine the dry ingredients together in medium size bowl. Use the whisk or fork to stir together and remove any lumps. If adding dried flowers or herbs, add them in this step.
In the small glass jar, stir together the wet ingredients.
If coloring your bath bombs, now add 1-2 drops of coloring to the wet ingredients and stir.
Slowly (and I mean slowly!) pour the wet mixture in with the dry mixture, whisking as you go. If you see the mixture fizz or foam, you may be adding the liquid too quickly. Just slow down adding the wet mixture.
Once the wet ingredients are combined with the dry, take a small amount in your hand and squeeze it together. It should stick together in maybe 1 -2 pieces. If it’s still too powdery to hold together, just slowly add a tiny bit more water and try squeezing it again.
Molding With 2 Sided Molds
Tightly pack each half of your mold with the mixture until it’s just overflowing a little. Press the mold pieces together, then gently remove one side of the mold. Place the bath bomb on a tray and allow to dry out before removing the other side (about an hour). The key here is be gentle in the un-molding process!
Molding With Silicone Ice Cube Tray
Tightly pack the bomb mixture into the molds, smooth and flatten the top. Let set for about 10 minutes and then carefully turn tray over and un-mold the bath bombs onto a baking sheet with a gentle tap to the top of each shape. As mentioned above, the key is to be gentle in the un-molding process!
Once your bath bombs are un-molded and on a baking sheet, they should dry at least 8 hours or overnight.
Once the bath bombs are totally dry, store in a glass jar. These make great gifts!
Expert Tips & FAQs
For Bath Bomb molds, you can use plastic fillable Easter eggs, a silicone ice cube tray or take a look around your recycle bin! You want something that is a little flexible. Do not use plastic ice cube trays, as the bombs may break apart when removing.
To make a bath bomb with 2 different colored sides: after step 2, split the wet and dry ingredients in half so you have 2 evenly measured bowls of dry and 2 evenly measured jars of wet ingredients. Add 1-2 drops of 1 color to 1 wet mixture and 1-2 drops of a different color to the 2nd wet mixture. Following step 4-5 below and then fill 1 side of 2 piece mold with one color, and the other side gets the filled with 2nd color and then follow step 6 forward.
In case a bath bomb cracks while being removed from a mold, go back to step 6 and start the molding process again. If needed, add a tiny bit of water to remix ingredients.
If your epsom salts already have a fragrance, you can skip adding the essential oils.
If you are making as gifts, keep in mind that people may be sensitive or allergic to different ingredients.
These ingredients make enough for 3-4 large (6 cm) diameter bath bombs or 12-14 smaller squares.