In a large container, mix together 32 ounces of baking soda and 16 ounces of citric acid. To get rid of clumps, you can push the powder through a sifter or break them up with your fingers. Citric acid has a tendency to take off nail polish, so wear gloves to protect your manicure.

Add 1 ounce of squalane oil, 0.5 ounces of polysorbate 80, and 9 mL of Lingonberry Spice Fragrance Oil.

Use your hands to thoroughly mix in the wet ingredients.

Test the consistency of the bath bomb mixture. It should feel similar to wet sand and holds its shape when squeezed. If it’s too dry, use one hand to spritz the mixture with witch hazel and one to mix.

Fill both halves of the mold. Pack the bath bomb mixture in but not too tightly. Mound a little extra powder in the center of each half. Firmly press the two halves together. Remove one half gently. You can fully unmold the bath bomb on a soft surface like egg carton foam, or let it harden in one half of the mold.

Allow the bath bombs to harden in the mold for at least 24 hours and then remove. If they're still soft, let them completely harden a few more hours.

In 3 small separate containers, mix about 1/2 teaspoon of Red Mica, 1/2 teaspoon of Evergreen Mica, and 1/2 teaspoon of Super Pearly White Mica with about 1/2 tablespoon of 99% isopropyl alcohol. Mix until smooth. Test the consistency on a paper towel or piece of paper. If you want a more saturated color, add a touch more mica. If you want a less saturated color, add more 99% isopropyl alcohol.

Using a small paint brush, create 3 circles in the center of the bath bomb with the Red Mica.

Paint a leaf with the Evergreen Mica.

Finally, add small dots on the berries and lines on the leaves. This step really makes the design pop.

Allow the bath bombs to fully dry. When you’re ready to use, drop them into a hot bath and enjoy. If you’re giving them as gifts, place them back into their mold – it doubles as packaging!