30-40dropsessential oils or powdered dried herbsLemongrass
Combine dry ingredients (baking soda, salt, citric acid, and cornstarch) in a large bowl and mix well until combined.
In a small bowl, combine the oil, witch hazel and vanilla extract and stir well. Add essential oils if using.
Add the liquid ingredients to the dry ingredients a few drops at a time. Mix well with hands (wear gloves if you have sensitive skin). Add powdered dried herbs if using.
Mixture should hold together when squeezed without crumbling. You may need to add slightly more witch hazel if it hasn’t achieved this consistency yet. I recommend using a spray bottle with additional liquid to evenly add.
Quickly push mixture into molds, greased muffin tins or any other greased container. Press in firmly and leave at least 24 hours (48 is better) or until hardened. It will expand some and this is normal. You can push it down into the mold several times while it is drying to keep it from expanding too much. Using the metal molds will create a stronger and more effective final bath bomb.
When dry, remove and store in airtight container or bag. Use within 2 weeks.