Making soap with aloe vera is straightforward whether you’re a complete beginner or an experienced soapmaker. You have two main paths: a simple melt-and-pour method that takes under an hour, or a cold process method that gives you full control over every ingredient. Both produce a gentle, moisturizing bar that takes advantage of aloe vera’s soothing and hydrating properties.
Why Aloe Vera Works Well in Soap
Aloe vera gel contains moisturizing compounds that help protect and hydrate skin. It has anti-inflammatory effects that can relieve discomfort from dry, itchy skin, and the American Academy of Dermatology Association recommends aloe vera products for soothing sunburn. In soap, aloe vera replaces some or all of the water in a recipe, adding a silky feel to the lather and leaving skin less stripped after washing.
One important distinction: aloe vera gel works better for skin than aloe extracts, because the gel itself contains the moisturizing elements that protect and heal. This means using actual gel (fresh or store-bought) in your soap rather than a diluted extract will give you the most benefit.
Preparing Fresh Aloe for Soap
If you’re working with a fresh aloe leaf, you need to separate the clear inner gel from the green outer skin and the yellow latex layer just beneath it. That yellow substance (called aloin) can irritate skin, so you want to remove it completely.
Cut the leaf into several sections, then use a sharp knife to run along the inside edges of each section, separating the gel from the skin. Scoop the gel out with a spoon or your fingers, then blend it until smooth. It will get fluffy, almost like whipped egg whites. Store the processed gel in the refrigerator if you’re making soap within a few days, or freeze it in ice cube trays for longer storage. Freezing is especially useful for cold process soap, since you’ll want your aloe liquid chilled before mixing it with lye.
Store-bought aloe vera gel works fine too. Look for products with a high percentage of actual aloe and minimal additives. Pure aloe juice (the kind sold for drinking) is another popular option for cold process recipes.
The Melt-and-Pour Method (Beginner Friendly)
This is the easiest way to make aloe vera soap. You start with a pre-made soap base, melt it down, stir in aloe gel, and pour it into a mold. No lye handling required.
You’ll need:
- 1 pound melt-and-pour soap base (glycerin, shea butter, or goat’s milk bases all work well)
- 1/4 cup aloe vera gel
- A microwave-safe container or double boiler
- A soap mold (silicone molds release easiest)
Cut the soap base into small cubes so it melts evenly. Heat it in 30-second bursts in the microwave, stirring between each, until fully melted. You can also use a double boiler on the stove for more gradual control. Once melted, remove from heat and let it cool for one to two minutes. Add 1/4 cup of aloe vera gel and stir gently to combine. If you want fragrance, add a few drops of essential oil at this stage. Pour into your mold, spritz the surface with rubbing alcohol to eliminate air bubbles, and let it harden completely (usually four to six hours at room temperature). Pop it out and it’s ready to use.
Adding more than about 1/4 cup of gel per pound of base can make the soap soft or reduce lather, so resist the urge to overdo it.
The Cold Process Method
Cold process soapmaking gives you complete control over your oils, superfat level, and the amount of aloe in the recipe. It does require handling lye (sodium hydroxide), so you’ll need gloves, eye protection, and a well-ventilated workspace.
A Simple Aloe Vera Soap Recipe
This coconut oil recipe from soapmaking educator Anne-Marie Faiola demonstrates the basic approach:
- 36 oz coconut oil
- 5.18 oz sodium hydroxide (lye)
- 10.53 oz chilled aloe vera liquid
The aloe vera replaces the water you’d normally use to dissolve the lye. This is the key technique for any cold process aloe soap: wherever a recipe calls for water, you substitute chilled aloe juice or blended aloe gel.
Step by Step
Start by chilling your aloe liquid. Cold or even partially frozen aloe helps keep temperatures down when the lye reacts with it, which reduces the chance of the mixture scorching or turning dark. Slowly pour the sodium hydroxide into the chilled aloe, stirring steadily until the lye fully dissolves. The liquid will turn a mustard yellow color. This is normal. Set it aside to cool.
Heat your coconut oil to about 120 to 130 degrees Fahrenheit. If you’re using a blend of oils (olive, palm, coconut, or others), melt and combine them at the same temperature range. Most soapmakers aim to bring both the oil and the lye solution to within 10 degrees of each other before combining.
Pour half of the lye solution into your oils and use a stick blender to mix thoroughly. Then add the remaining lye solution and blend only until the mixture emulsifies, meaning it holds together like thin pudding when you drizzle it across the surface. This is called “trace.” Adding the lye in two stages gives you more working time and more control, since the soap won’t thicken too quickly.
At light to medium trace, pour the soap into your mold. Cover with a lid or plastic wrap, then insulate with a towel. Let it sit undisturbed for 24 to 48 hours. Unmold, cut into bars, and cure on a rack in open air for four to six weeks. During curing, the remaining lye finishes reacting and excess moisture evaporates, producing a harder, longer-lasting bar.
Keeping the Color You Want
Fresh aloe and aloe juice will not give your soap a green color. The lye reaction and the curing process turn aloe brown or tan in nearly every case. If you want a green bar, you’ll need to add a natural colorant. Green clay and chlorella powder are two common options that blend easily into soap batter at trace. A small amount (about half a teaspoon per pound of oils) is usually enough for a soft green. Spirulina powder also works but can fade over time.
If you prefer a clean white or cream-colored bar, use aloe juice rather than fresh gel, and avoid overheating your lye solution. Titanium dioxide (a mineral colorant approved for cosmetics) can also lighten the final bar.
Preventing Spoilage
Cold process soap has a high pH that discourages mold growth, so using aloe as your liquid is generally safe for long-term storage. The saponification process breaks down most of the organic material. Problems tend to arise when large visible chunks of botanicals sit on or near the surface of the bar, since those pieces retain moisture and can develop mold over weeks or months.
With aloe, this means blending your gel completely smooth before adding it to the recipe. No visible chunks of aloe should remain. Some soapmakers with experience using fresh ingredients like avocado puree and aloe report no mold issues as long as the botanical is fully liquefied and evenly incorporated into the batter.
For melt-and-pour soap, the risk is slightly higher because the base has a lower pH. Use your aloe melt-and-pour bars within a few months, and store unused bars in a cool, dry place. If you notice any off smells or dark spots developing, discard the bar.
Adapting Any Soap Recipe
You don’t need a special “aloe vera soap recipe” to make aloe soap. Take any cold process recipe you already like and replace the water with an equal weight of aloe juice or blended aloe gel. Run the recipe through a lye calculator (several free ones exist online) to confirm your lye amount, since the calculator bases it on oil weight, not liquid weight. The aloe substitution won’t change your lye requirements.
For melt-and-pour, stick to roughly 1 tablespoon of aloe gel per four ounces of soap base. Going higher softens the bar. You can also look for melt-and-pour bases that already contain aloe, which simplifies things further and gives you a more consistent result.