How to Pasteurize Milk at Home




The milk you buy in the store is almost always pasteurized. that basically means it was disinfected so you can drink it without any bacteria or harmful organisms that might possibly be in it. This instructable shows how to pasteurize milk at home.


Step 1: Needed Stuffs

for this you will need

- glass milk bottles
- raw milk
- double boiler
- metal-stem thermometer


-an oven

Step 2: Preparations

Boil empty milk bottles submerged in water for 10 minutes to disinfect them. Alternatively, you can place the milk bottles in an oven preheated to 212 degrees F (100 degrees C) for 20 minutes to disinfect.

Step 3: More Preparations

Pour raw milk into the top of a double boiler and fill the bottom section with water. Place a metal-stem thermometer into the milk to monitor its temperature. Keep the thermometer from touching the sides or bottom of the double boiler so you get an accurate temperature reading of the milk, not the container.

Step 4: The Pasteurization

Heat raw milk to 145 degrees F and keep it at that temperature for at least 30 minutes. Stir constantly to avoid burning and to maintain an even temperature. For a faster method, heat the milk to 165 degrees F for at least 15 seconds, stirring constantly.

Step 5: Cooling and Storing the Milk

Put the top section of the double boiler that holds the heated milk into a pan of cold or ice water to cool the milk. Continue to stir. Cool the milk until it reaches 40 degrees F or below. Pour the pasteurized milk into the disinfected milk bottles. Cover and store in the refrigerator.

Step 6: Unnamed Step

the whole process only takes about 30-45 min. at the most. after that enjoy!

note: I got all the pictures of the internet because my camera is broken at the time.


You can keep pasteurized milk stored in the refrigerator for up to two weeks.
If you have read this Instructable, and attempted to pasteurize your own milk I am not responsible for anything that happened during the process of pasteurizing milk by these guidelines including burns, bruises, illnesses, etc. I am not responsible for anything but creating this instructable to inform you on how to pasteurize milk. Do your best.

Step 7: Information on Milk

goats milk is the most popular type of milk worldwide.
pasteurization and homogenization are very different.
homogenization is when the milk is pumped through a small orifice (opening) like that of a can of spray paint. This causes the milk fat  to be torn into molecules so small they cannot glob together again. this makes shaking your milk obsolete.

If you know something about milk or something closely related to milk, please send it to me via instructables inbox.



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    15 Discussions


    Question 5 weeks ago

    What are the five steps?


    6 years ago on Step 7

    Thanks for the useful information. Today I returned from the store with a gallon of skim milk and failed to noticed the sell by date is two days away. From experience I know this brand of milk will go bad a few days after the sell by date and would like to extend that time period. Is it safe and effective to re-pasteurize regular milk?


    9 years ago on Introduction

    Not really interested in pasteurizing milk at home, so I won't rate. I had to give you an e-high five (or is is "i"-high five these days?) for the Homestar Runner picture on the carton, though.


    10 years ago on Introduction

    "I got all the pictures of the internet because my family does not own a cow"

    I don't see any pictures of cows. Does your family not have a pair of pans, an oven, a fridge a thermometer or milk either?

    3 replies

    Reply 10 years ago on Introduction

    I think he/she means he didnt bother with hi own pictures because he couldnt make photos of him/herself making this

    PKMRadiant Creator

    Reply 10 years ago on Introduction

    OK, that makes a lot more sense. I'm usually wary of Instructables with no pictures because it makes me think "have you ever actually done this?" Fortunately there isn't much you really have to illustrate here- get milk, heat milk, fly- so the Instructable isn't really any worse for it.


    10 years ago on Introduction

    This is sterilization (over 100 degrees, 30 min) . Pasteurization is on 60 degrees Celsius on 10 minutes.

    1 reply

    10 years ago on Introduction

    Just in case you have a cheap supply of raw milk, and didn't already know how to pasteurize it?

    Good instructions, but I'm not sure how many people will find this useful. Over here (urban US), you pay *extra* for raw milk, and the last thing on people's mind would be to pasteurize it. ;-)

    2 replies

    Reply 10 years ago on Introduction

    Local farmer's markets, health food stores - that kind of place. If they don't have it, they may know where to find it.