How to Make Skim Milk at Home (Dairy Guide)
To make skimmed milk at home, chill pasteurized, non-homogenized milk in a clean, covered container at 40°F (4°C) or below for 12–24 hours. Lift off the cream that rises, then refrigerate the milk in a clean container. This reduces fat, but it does not ensure the milk meets the U.S. standard for nonfat milk.
A cream-top bottle can make this process seem simple: leave it alone, remove the layer, and pour the milk. The important part is keeping the milk cold and understanding what the method can and cannot do. Skimming works best when fat can rise to the surface, which is much more likely with non-homogenized milk.
I recommend treating homemade skimmed milk as milk with some cream removed, not as a guaranteed match for store-bought skim milk. Your result depends on the milk and its processing. The steps below help you work cleanly, keep the milk cold, and choose the right method for your goal.
Choose Milk and Prepare Clean Equipment
The best milk for gravity skimming is pasteurized, non-homogenized milk. “Gravity separation” means letting fat rise naturally while milk stays still. You also need a clean, food-safe container and a refrigerator that holds milk at 40°F (4°C) or below.
Look for labels such as “non-homogenized” or “cream top.” The cream may form a visible layer near the top of the bottle. Pasteurization matters: it reduces harmful germs, while refrigeration slows their growth. Do not use raw milk for this method.
Homogenization is a process that breaks milk fat into small droplets and spreads them through the milk. Those droplets do not rise into a neat layer as readily. As a result, surface skimming homogenized milk may remove little cream, or produce an uneven result. If your milk is homogenized, a cream separator may work better.
Choose a narrow, covered vessel made of food-grade glass or stainless steel. A narrow opening can make a cream layer easier to reach, and a lid helps protect the milk from spills and other foods. Avoid porous or reactive containers.
Before you start:
- Wash your hands with soap and water.
- Wash the vessel and skimming utensil with hot, soapy water.
- Sanitize them using a method or product suitable for food-contact items, and follow its directions.
- Check the refrigerator temperature with a refrigerator thermometer. Do not rely on how cold the fridge feels.
| Milk or method | What to expect | Best choice when |
|---|---|---|
| Pasteurized, non-homogenized milk | Cream may rise during chilling | You want a simple home method |
| Pasteurized, homogenized milk | A clear cream layer is unlikely | You accept limited fat reduction |
| Centrifugal cream separator | Separates fat by spinning milk; results depend on the device and milk | You want more consistent separation |
| Commercial nonfat milk | Made and labeled to meet a defined standard | You need milk with a verified fat level |
A cream separator is a device that spins milk so its components separate. It must be cleaned and used according to the maker’s instructions. For occasional use, buying cream-top milk and skimming it may be simpler. For a known fat level, choose commercially labeled nonfat milk.
Next step: Confirm that your milk is pasteurized and non-homogenized, then check that your fridge is at or below 40°F.
Chill, Separate, and Skim the Cream
Keep the milk cold while the cream rises. Pour it gently into the clean vessel, cover it, and leave it undisturbed in the refrigerator for about 12–24 hours. The separation time and the amount of cream that rises vary with the milk and how it was processed.
Step-by-step method
- Pour gently. Move the milk into the vessel without shaking it or stirring it. If it already has a cream cap, keep that layer as intact as you can.
- Cover and chill. Put the vessel in the refrigerator at 40°F (4°C) or below. Do not leave milk on the counter to speed up separation.
- Wait 12–24 hours. Keep the vessel still. Check for a visible layer of cream at the surface; the layer may be thin or thick.
- Remove the cream slowly. Use a clean spoon or small ladle to lift the cream from the top. You can also use a clean siphon, taking care not to draw up much of the milk below it.
- Stop if the layer is unclear. If the milk is homogenized or you cannot see a distinct layer, surface skimming may not remove much fat. Do not stir or shake it in an attempt to separate it.
The main challenge is disturbing the milk while removing cream. Work slowly, keep the spoon near the surface, and avoid scraping deeply into the milk. A small amount of milk may come away with the cream. That is preferable to mixing the cream back through the container.
Do not heat or boil the milk to make cream rise. Do not freeze it, either. These steps do not provide reliable skimming. Shaking also mixes fat through the milk rather than separating it. Refrigerated, undisturbed resting is the method for gravity separation.
If you want more complete and consistent separation, use a properly cleaned centrifugal cream separator that is designed for your type and amount of milk. Follow its instructions, including any directions on milk temperature and setup. A separator can improve separation, but home equipment does not by itself prove the final fat percentage.
| What you see | Likely reason | What to do |
|---|---|---|
| A thick layer on top | The milk allowed cream to rise | Lift the layer gently |
| A thin or patchy layer | Separation may be incomplete or the milk may be processed differently | Skim only what is visible; do not assume most fat is gone |
| No clear layer after chilling | The milk may be homogenized | Use a cream separator or accept limited reduction |
| Milk mixed into the cream while skimming | The utensil went too deep or the vessel moved | Pause, let it settle in the fridge, then try again |
Next step: Once you have removed the visible cream, transfer the milk to a clean container without stirring it.
Store Safely and Clean Equipment
Homemade skimmed milk is still a perishable dairy food. Keep it covered in the refrigerator at 40°F (4°C) or below, and use the original milk’s date and handling guidance. Removing cream does not make milk shelf-stable or extend its safe storage life.
Transfer the milk to a clean, covered container. Label it with the date you skimmed it so you can keep track of when you handled it. Keep it refrigerated between uses, and do not leave it out while you prepare other food.
Follow the two-hour rule: discard perishable milk that has been above 40°F (4°C) for more than two hours. If the surrounding temperature is above 90°F (32°C), such as in a hot room or outdoors, discard it after more than one hour. When in doubt about how long it has been warm, do not taste it to check whether it is safe.
Wash the vessel, lid, spoon, or siphon after use. Clean any cream separator as soon as its instructions allow, since milk residue can remain in small parts. Use the separator maker’s cleaning directions, and let parts dry as directed.
A few kitchen situations can help you choose your next step:
- You bought cream-top milk for coffee and cooking: Chill it, skim the visible cream, and use the milk as a lower-fat option. The fat level is not known.
- You need nonfat milk for a recipe that depends on a specific result: Use commercial nonfat milk. Home skimming may leave more fat than expected.
- Your milk is homogenized and the surface looks unchanged: Do not keep waiting at room temperature. Keep it cold and use a separator, or choose a different milk for future batches.
Next step: Store the skimmed milk cold, follow its original date guidance, and clean all equipment before storing it.
Serve and Use Homemade Skimmed Milk
Homemade skimmed milk can be used as milk with some cream removed, but its fat content is not known. In the United States, skim or nonfat milk contains less than 0.5% milkfat. Home skimming does not guarantee that limit, and it does not remove all fat.
You can use your homemade milk in everyday ways that do not require a measured fat percentage, such as pouring it over cereal or adding it to a drink. For recipes that depend on a specific milkfat level, such as some baking or dairy recipes, use milk with a labeled fat content. The difference can affect the recipe’s fat, texture, or richness.
The remaining cream can be kept as a separate dairy ingredient if handled safely. Store it covered and cold, and follow the original milk’s date and handling guidance. It is not safe to leave the cream at room temperature while you decide how to use it.
Here is the key distinction: removing the visible cream is a kitchen technique, not a way to certify milk. A home result may be lower in fat than the starting milk, but it can still contain a meaningful amount. Do not label it “nonfat” or assume it meets the U.S. standard.
Next step: Use home-skimmed milk where an approximate reduction is acceptable; choose labeled nonfat milk when the fat level needs to be reliable.
Frequently Asked Questions
Can I make skim milk from regular store-bought milk?
Yes, if it is pasteurized and non-homogenized, cream may rise during refrigeration. Homogenized milk is unlikely to form a layer that can be removed reliably.
How long should milk sit before I skim it?
Leave it undisturbed in the refrigerator for about 12–24 hours. Keep the refrigerator at 40°F (4°C) or below.
Can I leave milk on the counter so the cream rises faster?
No. Keep the milk refrigerated during separation. Do not leave it warm to speed up the process.
Does skimming homemade milk make it nonfat?
Not necessarily. Home skimming does not guarantee the U.S. standard of less than 0.5% milkfat, and it does not remove all fat.
Can I skim homogenized milk?
You can try, but homogenized milk often does not form a clear, removable cream layer. A properly used cream separator is a better option for more consistent separation.
Should I heat or boil milk before skimming?
No. Heating or boiling does not provide reliable cream separation. Keep the milk cold and let it stand undisturbed.
How do I remove cream without mixing it back in?
Use a clean spoon or ladle to lift the surface layer slowly, or use a clean siphon. Avoid moving the vessel or dipping deeply into the milk.
How long does homemade skimmed milk keep?
Follow the original milk’s date and handling guidance. Keep it covered at 40°F (4°C) or below; removing cream does not extend its safe storage life.
Can I freeze milk to separate the cream?
Freezing is not a reliable way to skim cream. Use refrigerated gravity separation with non-homogenized milk, or use a cream separator.
When should I discard milk left out after skimming?
Discard it if it has been above 40°F (4°C) for more than two hours, or for more than one hour when the surrounding temperature is above 90°F (32°C).
(This article was written by one of our staff writers, Daniel M. Whitaker. Visit our Meet the Team page.)
