In a large mixing bowl, whisk together all the DRY Ingredients (Baking Soda, Epsom Salts, Corn Starch, Citric Acid, Optional Strawberry Dust.)
Put all the WET Ingredients (Water, Almond Oil, Perfume Oil) in a small jar with a lid. Close the lid and shake to mix. NOTE: If you are using a soap colorant to color your bath bombs, be sure to add it in this step.
Slowly (a teaspoon or two) at a time, stir the WET ingredients from the jar into the DRY ingredients in the bowl. Use the whisk to continously stir as you add in the liquid ingredients. This will help you avoid activating the Citric Acid. It’s OK if it fizzes a little bit, but try to stir quickly so it doesn’t happen.
Use your hands to knead the mixture and make sure the wet and dry ingredients are combined. The mixture should feel like barely damp sand and mostly hold its shape when squeezed together. If it does not, add a drop of oil and stir. Keep repeating this until the right consistency is reached.
Fill each half of the bath bomb molds with the bath bomb mixture. Use your fingers to gently press the mixture to lightly pack it into each mold. Press each half of the mold together to make a sphere and set it down. Repeat to fill all bath bomb molds. Allow the bath bombs to sit in the molds for 10 minutes before attempting to remove them.
Carefully lift to remove the top and bottom molds from each bath bomb. Allow bath bombs to dry and cure (harden) for another 12-24 hours before using. Store bath bombs in an airtight container. Use within 2-3 months.