Bath bombs have become a popular and indulgent addition to many people’s self-care routines. These fizzy, aromatic spheres transform a regular bath into a relaxing and spa-like experience. But have you ever wondered what bath bombs are made from? In this blog post, we will explore the key ingredients that go into making bath bombs, shedding light on the chemistry behind these delightful creations.

Baking Soda (Sodium Bicarbonate)

Baking soda, also known as sodium bicarbonate, is the primary and most essential ingredient in bath bombs. This white, powdery substance plays a crucial role in creating the characteristic fizz when the bath bomb is submerged in water. Baking soda is not only responsible for the effervescent reaction but also helps soften the water, making it feel silky and smooth on your skin.

Citric Acid

Citric acid is another key component in bath bombs. When combined with baking soda, it reacts to create carbon dioxide gas, producing the fizzing effect that makes bath bombs so enjoyable. Citric acid not only enhances the sensory experience but also acts as a natural preservative in bath bomb formulations.

Epsom Salt (Magnesium Sulfate)

Epsom salt, or magnesium sulfate, is a popular addition to bath bombs due to its therapeutic properties. It can help soothe sore muscles, reduce inflammation, and promote relaxation. Epsom salt is an excellent complement to the other ingredients, providing additional comfort and rejuvenation during your bath.


Cornstarch is often included in bath bomb recipes to help bind the other ingredients together and give the bath bomb a smooth texture. It contributes to the structural integrity of the bath bomb, preventing it from crumbling or falling apart before use.

Essential Oils

Essential oils are responsible for the delightful scents that make bath bombs so aromatic. These concentrated plant extracts offer various fragrances, allowing you to choose the scent that best suits your mood and preferences. Popular essential oil choices for bath bombs include lavender for relaxation, peppermint for invigoration, and citrus oils for a refreshing bath experience.

Water or Witch Hazel

A liquid is needed to bind the dry ingredients and create the right consistency for molding the bath bomb. Water is a common choice, but witch hazel is often preferred because it dries more quickly and helps prevent premature fizzing before use. Using a spray bottle to distribute the liquid evenly is a popular method in bath bomb making.


To give bath bombs their vibrant and eye-catching colors, colorants are added to the mixture. These colorants come in various forms, including liquid dyes, powdered pigments, or natural colorants like beetroot powder or spirulina. Be cautious when using colorants to avoid staining your skin or bathtub.

Additives and Botanicals

Many bath bomb enthusiasts enjoy enhancing their creations with additional additives and botanicals, such as dried flower petals, herbs, or oatmeal. These ingredients can add visual appeal and provide extra benefits, like soothing irritated skin or providing an enticing visual element when the bath bomb dissolves.

Special Effects

Some bath bombs come with special effects, such as glitter or shimmer. These are often made from cosmetic-grade mica powders or biodegradable glitter. The addition of shimmer adds a touch of luxury to your bath, making it even more enjoyable.

Customizable Ingredients

Part of the fun of making or selecting bath bombs is the ability to customize the ingredients to your liking. You can adjust the concentration of essential oils to control the scent strength, choose specific colorants to match your mood, or experiment with different botanicals and additives to create a unique bath experience.


Bath bombs are crafted from a combination of basic but carefully selected ingredients that work in harmony to create a delightful and aromatic bath experience. Baking soda and citric acid form the fizzy foundation, while Epsom salt and essential oils contribute to relaxation and skin benefits. Other ingredients, such as cornstarch, colorants, and special effects, allow for creativity and personalization. Whether you choose to purchase bath bombs or embark on making your own, understanding the components of these enchanting spheres adds to the appreciation of the self-care ritual they offer. So, next time you enjoy a luxurious bath with a bath bomb, you’ll have a deeper appreciation for the chemistry and craftsmanship that goes into creating this soothing experience.

Need Spa Products in El Cajon, CA?

Soaps & Scents has been making beautiful handmade soaps for over 20 years. We have bar and liquid soaps in a variety of fragrances and even some fun soaps such as our Ducky or Cupcake soaps. We make everything by hand in small quantities, and all of our products are free of animal products. We also use the highest percentage of essential oil and fragrance oil that you can use, so the products will maintain their wonderful scent even years later. In addition to our soaps, we also offer bath bombs, body lotions, room sprays, and more! If you haven’t had a chance to try our wonderful soaps and products, you’re in for a treat. Contact us today to learn more about your first Soaps & Scents bar. We are available on Saturdays by appointment!