To make cannabis bath bombs, combine 1 cup baking soda, 1/2 cup citric acid, 1/4 cup Epsom salt, and 1/4 cup cornstarch, then stir in 1/4 cup cannabis-infused carrier oil and 10 to 15 drops of essential oil. Spritz the mix with witch hazel until it clumps like damp sand, press it firmly into molds, and cure the bombs for 24 to 48 hours. This cannabis bath bombs recipe makes about six to eight standard-size bombs.
Cannabis Bath Bombs Review: The Ultimate Guide for Relaxation and Immersion
The Base Ratio That Actually Works
Bath bombs live or die on two things: the ratio of baking soda to citric acid, and how much oil you add. Too little oil and the bomb crumbles. Too much and it turns into a soft, greasy puck that never sets.
Find Cannabis Bath Bombs Near You: A Pop's Cannabis Guide
- 1 cup baking soda (sodium bicarbonate), the base that reacts with the acid
- 1/2 cup citric acid, the fizz
- 1/4 cup Epsom salt or coarse sea salt, for a mineral soak
- 1/4 cup cornstarch or arrowroot powder, which keeps the mix dry and firm
- 1/4 cup cannabis-infused oil, the carrier for your cannabinoids
- 10 to 15 drops essential oil, optional, for scent
- Witch hazel in a spray bottle, to bind without triggering the fizz
Never use water to bind the mixture. The moment liquid water touches citric acid and baking soda, the reaction starts and your bomb is spent before it hits the tub. Witch hazel evaporates and leaves the fizz intact.
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How to Infuse the Carrier Oil
Coconut oil, fractionated coconut oil, jojoba, and sweet almond oil all work. Fractionated coconut oil is the friendliest for bath bombs because it stays liquid at room temperature and leaves less residue on the tub.
- Decarboxylate your cannabis. Spread ground flower on a baking sheet and heat at 240°F (115°C) for about 40 minutes. This step converts THCA into THC and CBDA into CBD.
- Combine 7 to 14 grams of decarbed flower with 1 cup of oil in a double boiler or a mason jar set in a water bath.
- Hold the oil between 160°F and 180°F for 2 to 4 hours, stirring now and then. Do not let it boil.
- Strain through cheesecloth or a fine mesh strainer, squeeze the plant material, and store the oil in a sealed jar in the fridge.
If you want zero cannabis aroma, skip the flower and use a measured amount of distillate or a CBD isolate, warmed gently into the oil.
Step by Step Assembly
- Whisk the baking soda, citric acid, Epsom salt, and cornstarch in a large bowl until no clumps remain.
- Drizzle in the infused oil while whisking. The mix will look slightly crumbly, which is correct.
- Add essential oil if using, and whisk again.
- Spritz with witch hazel, one pump at a time, and squeeze a handful. When it holds its shape, stop spraying.
- Pack the mixture hard into silicone or metal molds, overfilling slightly and pressing down firmly.
- Let the bombs sit in the mold for 20 minutes, then tap them out onto parchment paper.
- Cure in a dry room for 24 to 48 hours before sealing them in an airtight container.
Variations Worth Trying
- CBD only: Use broad-spectrum CBD oil or CBD isolate for a non-intoxicating soak.
- Soothing blend: Add colloidal oatmeal and lavender essential oil for dry or irritated skin.
- Cooling blend: Add a few drops of peppermint essential oil, but keep it under 5 drops so it does not sting.
- Colored bombs: Use mica powder or a small amount of cosmetic-grade clay. Skip food coloring, which can stain tubs.
Does a Cannabis Bath Bomb Get You High?
No. THC and CBD are not absorbed through the skin in amounts that produce a psychoactive effect, so a cannabis bath bomb is best treated as a topical soak for relaxation and skin feel rather than an edible-style high. The warm water and oil can help cannabinoids spread across the skin and may ease surface discomfort, but the effect stays local.
Storage and Shelf Life
Humidity is the enemy. Keep cured bombs in a sealed glass jar with a silicone packet if your bathroom runs damp, and store them in a cool, dark cabinet. Properly cured and sealed bombs hold their fizz for six to twelve months. If a bomb starts swelling or feels soft, it has absorbed moisture and will fizz weakly.
Safety Notes
- Bath bombs make tubs slippery. Use a mat and rinse the tub after each soak.
- Patch test on your inner arm before your first full bath, especially if you add essential oils.
- Keep bombs away from children and pets. Edible-looking discs get chewed.
- If you are subject to drug testing, talk to a clinician first. Some topical cannabis products can leave trace detectable metabolites.
- CBD can interact with prescription medications, including blood thinners. Check with a pharmacist before regular use.