These fizzy DIY bath bombs are fun to make and ideal for self-care or gifting. Customize them with essential oils, herbs, or natural colorants for a spa-like soak at home. This simple recipe uses basic ingredients and delivers beautiful results every time.
Mix the Bomb Base: Combine baking soda and cornstarch in a mixing bowl using a whisk.
Prepare Liquid Mixture: In a separate bowl, mix the liquid ingredients together; essential oils (optional), colorant (optional), and water.
Combine the Bomb Base and Wet Ingredients: Gradually add the wet ingredients to the dry ingredients, blending well.
Allow to Rest: Let the blend sit for 3-4 minutes.
Test the Texture: Check the texture by pressing the mixture into your hands. It should hold together without being too wet. If it holds shape, it's ready for the mold. If it’s too crumbly, add a few more drops of water.
Mix in Citric Acid: Slowly mix in the citric acid. Take your time so that the acid doesn't react with the liquid in the mixture causing the bomb to become inactive.
Press Mixture into Molds: Firmly press the mixture into your chosen molds. Use your fingers or a spoon to ensure the mixture is packed tightly.
Let Dry: Allow your bath bombs to dry in the mold for at least 24-48 hours.
Remove Bomb from Mold: Remove bombs from mold and set them on a wire rack. Let them sit out for another 24 hours to fully dry and harden.
Notes
Use a fine mesh strainer for even texture: Sifting the dry ingredients before mixing helps create a smoother bath bomb with a more professional finish.
Don’t rush the citric acid step: Adding it too quickly or mixing too aggressively can cause early fizzing. Sprinkle it in slowly and mix gently to maintain the bomb’s effectiveness.
Drying time may vary: If your space is humid or cool, allow extra drying time. Fully dried bath bombs will feel firm and no longer cool to the touch.
Storage tip: Store finished bath bombs in an airtight container in a cool, dry place. This helps preserve their fizz and prevents them from absorbing moisture from the air.