In a large bowl combine baking soda, citric acid, cornstarch and Epsom salt.

Pour in melted coconut oil and essential oil. Mix until well combined.

Lightly spray witch hazel a few times until you can gather the mix in your fist and it holds its shape. If it easily falls apart then you might need 1-3 more sprays of witch hazel. Avoid spraying too much or your mix will start fizzing. You only need enough to slightly dampen the mix.

Press the mix into your mold and allow them to set for at least one hour, or until dry, before removing.