Ingredients/materials: 1 c. baking soda, 1/2 c. cornstarch, 1/2 c. Epsom salt, 4 Tbsp. cream of tartar, 2 Tbsp. coconut oil (melted), 5-10 tsp. water, food coloring, plastic easter eggs, measuring cups, bowl.
- In one bowl, mix together the dry ingredients (baking soda, cornstarch, epsom salt and cream of tartar).
- In a separate bowl, mix food coloring and coconut oil. Slowly mix together the dry ingredients and the coconut oil.
- Whisk together all ingredients until the mixture forms a crumbly texture. It should be fairly dry but just wet enough to hold its shape when molded together. Use fingertips, as needed, to knead together the mixture after whisking. Add water as need to obtain this texture, but be sure to add the water slowly (about 1/2 tsp at a time and then mix in) otherwise the ingredients will fizz up in the bowl before you make the bath bombs.
- Fill the eggshell with the mixture, patting down tightly after to ensure it sticks together. It has to be really tightly packed or it will fall apart when you remove it from the egg shells.
- Gently squeeze the eggshell together to remove the bath bomb from the mold. It helps to squeeze and twist a bit, then squeeze again to slowly allow the bath bomb to release from the eggshell. Be patient. Allow to sit and dry overnight on a towel. Enjoy in the bathtub!