This Amish-style laundry soap is a dry powder made with finely grated bar soap, washing soda, and borax, then measured directly into a washer or dissolved first for a cold-water cycle. Homemade formulas vary, and there is no single recipe used by every Amish household; this small-batch version keeps the ingredients simple and the dosing practical.
Ingredients
- 1 plain, unscented laundry or castile soap bar, 5.5 ounces (156 g), preferably without added lotion or oils
- 1 cup washing soda, about 220 g; check the package because the weight can vary by brand
- 1 cup borax, about 240 g; check the package because the weight can vary by brand
The gram amounts for the powders are useful estimates, not universal conversions: crystal size and how a cup is filled affect the weight. Use sodium carbonate labeled washing soda, not baking soda, which is a different, less alkaline product. Choose plain soap rather than a heavily moisturizing bath bar; added oils and conditioners can contribute to residue on clothes or inside the washer. No water is needed for the dry mix.
Instructions
- Set up safely. Work on a dry counter with good ventilation. Keep children and pets away, and avoid raising or breathing powder dust. Washing soda and borax can irritate eyes or skin, so handle the powders carefully; gloves and eye protection are sensible if you are prone to irritation. Use a clean, dry grater and bowl, and keep laundry-making tools separate from food preparation while you work.
- Grate the soap finely. Unwrap the bar and grate it on the fine side of a box grater into a large, dry bowl. Aim for small, even flakes rather than thick curls, which take longer to disperse in a wash. Grating usually takes about 6 to 8 minutes, depending on the bar and grater. Keep your fingers clear of the blade as the bar gets small.
- Combine the dry ingredients. Add 1 cup washing soda and 1 cup borax to the grated soap. Stir slowly with a dry spoon for 2 to 3 minutes, scraping the bottom and sides so the powders and soap are distributed evenly. Move gently to limit dust. If you see clumps, break them apart with the back of the spoon; do not add water to the storage batch.
- Check the texture and pack it away. The finished mixture should be loose, with fine soap flakes and no damp patches. Transfer it to a clean, completely dry, tightly closing container. Label it clearly as laundry soap and include the basic dose: start with 1 tablespoon per regular load. A batch of this size makes roughly 56 regular-load doses, though the actual number depends on how much volume the grated bar contributes.
- Use a measured dose. For a regular load, use 1 level tablespoon. For a large or heavily soiled load, try 2 tablespoons rather than adding a large unmeasured scoop. Put it where your washer manual allows powdered detergent or soap. In a cold cycle, dissolve the dose in about 1 cup (240 ml) warm water in a separate container, then add it to the washer as directed by the machine manual. Do not pour homemade powder into a liquid-only dispenser unless the manufacturer says that is suitable.
The total time is about 15 minutes of active work, with no cooking or setting time. The amount per load is a starting point, not a guarantee of the same results in every washer: load size, water hardness, washer design, and soil level all affect how much product is useful. If clothes feel coated or the machine develops visible residue, reduce the dose or stop using the mixture.
Tips
- Keep the flakes small. Finely grated soap disperses more readily than thick shavings, especially in a short or cool wash. If your grater produces coarse curls, break them up carefully with a clean utensil before mixing. A food processor is not necessary; if you choose to use one, reserve it for laundry materials and do not return it to food use.
- Measure before increasing the dose. More soap does not automatically mean cleaner clothes. Too much can leave a film, especially in hard water or a high-efficiency washer. Start with 1 tablespoon for a regular load and adjust only in small increments if your washer and clothing respond well.
- Do not mistake washing soda for baking soda. Washing soda is sodium carbonate and is more alkaline; baking soda is sodium bicarbonate and will not make the same formula. Read the label before measuring, and do not substitute baking soda cup for cup and expect equivalent washing performance.
- Follow garment and washer instructions. This soap-based blend is not a universal replacement for commercial detergent. It may be unsuitable for wool, silk, delicate finishes, or machines whose manuals prohibit soap or homemade laundry mixtures. Avoid using it on garments that require a specialty detergent, and check a care label before washing an unfamiliar fabric.
Serving Suggestions
Here, “serving” means a laundry dose: begin with 1 level tablespoon for a typical load of everyday clothing. Use 2 tablespoons for a large, full load or laundry with more soil, but do not assume that heavily stained items need an unlimited amount of soap. Treat stains separately according to the fabric label, and wash promptly when possible. This powder is intended for ordinary washable fabrics, not as a stain remover or a substitute for a garment-specific cleaning method.
For a cold-water load, pre-dissolving a measured dose in warm water can help the soap disperse. Add that solution only where your washer manual allows it; some machines specify that products go in a particular compartment or directly in the drum. For a warm or hot wash, the powder may disperse more readily, but always use the temperature appropriate for the garment and the washer. Do not add extra powder just because a load is cold.
Check a small or inconspicuous area first if you are unsure how a fabric or dye will respond. Wash pale and dark colors according to their care instructions, and avoid leaving damp, soapy clothes sitting in the machine after a cycle. If a load comes out with a slippery feel, visible flakes, or a dull coating, rewash it without this mixture and use less—or discontinue the recipe for that machine and water supply.
Variations
Make it without borax: Omit the 1 cup (about 240 g) borax and keep the soap and washing soda amounts the same. The formula will have a different balance and may perform differently, particularly in hard water, so begin with a small dose and assess the result. Do not replace borax with an equal volume of an unrelated household powder and assume it behaves the same way.
Try a different plain bar: A fragrance-free laundry bar or a simple, unscented castile bar can stand in for the listed soap, provided its label shows no heavy lotion or conditioner additions. Bar weights vary, so use a bar close to 5.5 ounces (156 g); a much larger bar adds more soap and may increase residue. If your substitute has a strong scent, the finished powder and washed clothing may carry that fragrance.
Make a smaller trial batch: Use half a bar, ½ cup washing soda (about 110 g), and ½ cup borax (about 120 g). Grate and mix in the same way, then test it on a few ordinary loads before making more. A trial batch is a practical option when you do not know whether your water is hard or whether your washer handles soap-based products well.
Keep it unscented: The basic recipe contains no added fragrance. Avoid adding liquid essential oils or water to the storage jar: liquid can cause clumping, and concentrated fragrance may not disperse evenly through the powder. If fragrance matters to you, a clearly labeled scented bar is a simpler alternative, though it will change the scent of the finished mixture.
Storage and Reheating
Store the finished powder in a tightly closed, clearly labeled container in a cool, dry cupboard, away from steam, sinks, children, pets, and food. A dry plastic or glass container with a secure lid works; use a clean, dry scoop each time. Moisture can make the soap clump and the powders harder to measure, so do not keep the jar beside a shower, over a washer that releases steam, or where wet hands can reach inside.
There is no standardized tested shelf life for this homemade mixture. For best handling and quality, make only what you expect to use within about 3 months, and discard it if it becomes damp, develops an unusual odor, or cannot be broken into a consistent powder. Keep the product in its labeled container rather than transferring it to an unlabeled jar. Follow the product labels for washing soda and borax, and never store the mixture where it could be mistaken for food.
There is no reheating step for laundry soap. Do not heat the dry mixture or warm it in the storage container. If you need to help one dose dissolve for a cold wash, mix that dose with warm water in a separate container immediately before use, then follow the washer manual. Keep unused powder dry rather than preparing a large liquid batch, which would be more prone to separation and spoilage.
Frequently Asked Questions
Is this an authentic Amish laundry soap recipe?
There is no single formula that represents every Amish household or community, and homemade laundry recipes vary. This is best described as an Amish-style version of a simple soap-and-washing-soda powder, not a claim that it is the one definitive or historically fixed recipe.
Can I use this in a high-efficiency (HE) washer?
Check the washer manual first. Although the powder may not create the same suds as some detergents, that does not establish that a soap-based homemade formula is suitable for an HE machine. Soap can leave deposits, particularly with hard water, so use it only if the manufacturer permits it and stop if you notice residue, odors, or poor rinsing.
Will this work in hard water?
Results can vary. Soap can react with minerals in hard water and leave deposits on fabric or machine surfaces, so a homemade soap powder may perform poorly even when you measure carefully. If clothing feels coated or the washer accumulates residue, do not keep increasing the dose; consider a detergent formulated for your water conditions instead.
Can I use baking soda instead of washing soda?
No, not as a direct substitute. Washing soda is sodium carbonate, while baking soda is sodium bicarbonate, and they have different properties in a laundry mixture. Use the ingredient named on the recipe and its package; changing it alters the formula rather than making an equivalent version.
Is this suitable for sensitive skin or baby clothes?
Do not assume that homemade means gentle or suitable for every person. Washing soda and borax are alkaline powders, and soap residue or fragrance from a substituted bar may bother some wearers. For baby clothes or anyone with a known sensitivity, use a detergent recommended for that purpose, follow the garment label, and avoid this mixture unless you already know the ingredients are suitable.
Can I add chlorine bleach or vinegar to the same wash?
Do not mix this powder with other laundry products in the storage container. For bleach or any additive, follow its label and the washer manual rather than improvising a combination; never mix chlorine bleach with vinegar, ammonia, or other cleaners. If you are uncertain about an additive, run the load with one product at a time and check the relevant labels.
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