Here is the recipe, I posted it in the recipe forum also:
Bath Bombs
Ingredients:
1/2 cup baking soda
1/4 cup citric acid
1/4 cup cornstarch
2 tablespoons sweet almond oil
1 teaspoon water
1 teaspoon fragrance oil or essential oil
1/8 teaspoon borax
Instructions:
Mix the first 3 ingredients in a mixing bowl. Combine oil, water, fragrance and borax in jar and coloring, if desired. Shake jar vigorously to mix. Add liquid to dry ingredients a bit at a time and quickly mix with a pastry blender. Press into molds or roll into balls and let sit overnight to dry, store in a glass jar.
I unmolded mine immediatly. I could not roll these into balls, I pressed them into a muffin tin.