How to Make a Cave to Age Cheese




About: Eric J. Wilhelm is the founder of Instructables. He has a Ph.D. from MIT in Mechanical Engineering. Eric believes in making technology accessible through understanding, and strives to inspire others to lear...

This is how I converted a small refrigerator into a temperature and humidity-controlled "cave" for aging cheese. 

While traveling in Spain, I fell in love with aged Manchego cheese: the older the better.  I can easily find Imported 1-year old Manchego in the US, but it just isn't what I remember -- either the farms willing to do export aren't as good, the cheese hasn't been aged long enough, or maybe the context is all wrong and one can only enjoy Manchego in the dry winds of La Mancha.  Northern California has a number of artisan cheese makers, but doesn't have a strong cheese-aging tradition.  Most cheese here is measured in months, not years like in Spain.  So, I decided to try aging some locally produced cheese myself.

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Step 1: Plan the Cave's Construction

Donna Pacheco of Achadinha Cheese Company told me that she ages her cheese at 55°F and 80% relative humidity.  That's about the same conditions you would find in a natural cave, perfect for aging cheese.  (See the last step for details on the cheese I'm aging.)

The crawl space under my house is pretty cool most of the year, and I even measured the temperature of the ground a few inches below the surface at 59°F.  However, there are vents to the outside, so the humidity is the same as ambient, and it rarely gets as high as 80%.  I briefly considered converting a pantry with an exterior wall into a temperature-controlled cave using a window air conditioner and CoolBot controller -- but you know things are getting out of hand when you consider cutting holes in the  wall for cheese you haven't yet tasted.  In the end, I decided to follow the rough outline of the Converting a fridge for fermenting beer Instructable, and use a small fridge with a temperature controller placed in the crawlspace.

Step 2: Cheese Cave Materials

I managed to do this project for under $200 using a mix of new, used, and scavenged parts:

Small refrigerator, bought used on Craigslist for $60
Ranco ETC-211000-000: 2 Stage Temperature Controller $100
Honeywell TM005X Wireless Indoor/Outdoor Thermo-Hygrometer $30
miscellaneous wires and old extension cords
ceramic light bulb holder stolen from one of Randy's projects

Step 3: Wire Up Temperature Controller

Using two old extension cords, I wired up the temperature controller so that the fridge plugged into one relay, and a light bulb plugged into the other.  I set the fridge's internal thermostat to the coldest setting.  The light bulb is only 25 watts - if that doesn't keep the fridge warm enough, I'll put a bigger bulb in.

Next, I tested all the parameters by sticking the temperature probe in hot and cold water.

Step 4: Mount the Temperature Controller and Secure the Wires

I screwed a scrap piece of wood to the top of the fridge, and mounted the temperature controller and wires to it.  I ran the temperature probe and light bulb wires in through the door and taped them in place.  If this turns out to be too much of an opening, I'll drill a hole and thread them through later.  I placed the remote thermometer and hygrometer in the fridge, and put the display on top of our primary refrigerator so I could check on the conditions in the cheese cave every time I walked through the kitchen.

Step 5: Install a New Outlet

There wasn't an outlet near where I wanted the fridge, so I installed one.  It's not impossible for this area to get wet, so I choose a GFI.  Like all my electrical or plumbing projects, there was something wrong upstream that ballooned the time required for this small chunk of the project.  In this case, the newly installed GFI had an open ground, and I had to trace the problem two junction boxes away to find the bad connection.  

Step 6: How to Increase the Humidity in Your Refrigerator

Increasing the humidity in the fridge was a simple matter of adding water.  One yogurt container filled with water brought the refrigerator's humidity to 60%, which wasn't much above ambient.  Three containers, as seen in the images, brought it up to my target of 80%.  If three didn't do it, I planned to expose even more of the water's surface area by floating a sponge in the water or using some gravel or rocks.  

When the temperature controller runs the fridge, the humidity usually drops 10-15%, but climbs back up to around 80% in under an hour.  Since it's cool in the crawlspace, the fridge doesn't turn on much at all, and the temperature stays right around 55°F.

Step 7: Get Cheese, Start Aging

To start the cheese-aging process, I purchased a full wheel of Achadinha Capricious goat cheese.  The wheel was made in June 2009 and so is already aged 9 months.  I choose Capricious because as if it's some of the best cheese I've tasted in the US.  I figure for my first test, I should start with something excellent.  With my cave now setup, I plan to add a wheel of sheep's milk cheese and some others as soon as I can.

Donna Pacheco, the Achadinha cheesemaker, says she oils the Capricious wheels weekly with olive oil when they're young, and monthly as they age to reduce drying.  She also stores them on their side and regularly rotates them.  So, I oiled my wheel and set a repeating calendar event to remind to rotate and re-oil monthly.  When I get more wheels of cheese, I'll build a rack to hold them on their side; for now, the first wheel is laying flat.

I'll post results in a year or so!

Step 8: Pictures of Cheese at Various Ages

This step has pictures of the cheese at various ages.

2010-11-03 The weight of the cheese is now 4.5 pounds.  When I first received it at 9 months old, it was 4.75 pounds.

2011-08-14 Cheese now weighs 2058 g.



    • Indoor Lighting Contest

      Indoor Lighting Contest
    • Stone Concrete and Cement Contest

      Stone Concrete and Cement Contest
    • DIY Summer Camp Contest

      DIY Summer Camp Contest

    16 Discussions


    4 years ago on Introduction

    It's been several years since you did this- how has the cheese cave held up? Do you still use it? Was it worth the monthly hassle to age your own cheese?


    6 years ago on Introduction

    Just a thought: If you added a humidistat to your setup, and hooked up a fogger or an ultrasonic humidifier, you might have an easier time controlling the humidity during the colder seasons of the year.


    7 years ago on Step 8

    Come on! You have to taste it already! How will I know if this instructable is any good? The suspense is killing me, I've only been waiting for 5 minutes. : /


    9 years ago on Introduction

    I'm very happy to have found this instructable, as I've been wanting to get one of those myself.

    As someone who is in the cheese business, and if the US system is any way like the Canadian one, its nearly impossible for cheesemakers to age cheese long enough to stand up to their European counterparts. The simple and sad fact is that their overhead is so low, they cant afford to just sit on their stock for year, even if it would make a better product. For most, a couple of months is all you get, unless its cheddar, simply because you can make different batches, so that you are more likely to make a profit anyways.

    The second thing is that the "age" of a cheese has not so much to do with time, as it has to do with taste. The age rating is determined by how strong it tastes as compared with existing products. Given that cheddar is the most likely candidate for aging, there are different processes that they put the product through to ripen it (like low heat/pressure combination.) as some local makers have experimented; under that system, a cheese may be rated "2 years old", while it has only been ripened 6 months.

    And even the European stuff is not actually as old as listed; a 3 year old parmegiano regianno is actually 2 1/2 years old, at the time of packaging.

    Sorry about the rant, but I cant stop the craftman from venting :D I love Instructables and will keep an eye out for building this one and possibly its update if one is necessary!

    2 replies

    Reply 9 years ago on Introduction

    Thanks for your comment!  I'd love to see some of your cheese making techniques -- even a "tour" of the process, if a full Instructable isn't appropriate, would be welcome.  


    Reply 9 years ago on Introduction

    A "from scratch" operation is in the future (hence my appreciation of the fridge), but so far, what I've made involves more the "value added" process, like soaking in wine, or adding a chili crust to existing cheese. Maybe I would very well do an Instructable on the subjects when I start my next project batch :D


    9 years ago on Introduction

    its 9am, im at work, and now CRAVING some good, hard cheese!
    may i ask how much a wheel of the Capricious costs? that wheel looks enticing already. how soft is it now, at 9 mos?
    i have a mold allergy, in your opinion, doctor, is aging my own cheese a health risk??

    2 replies

    Reply 9 years ago on Introduction

    As my Grandfather used to say, "It's after noon somewhere."  Although I suppose that's more applicable to highballs than hard cheese...

    The wheel of Capricious was $90, or $19/pound.  It's pretty firm, and from tasting similarly aged wheels, I expect it would still be slightly moist, but not yet fully crumbly. 


    Reply 9 years ago on Introduction

    It is as risky as your allergic re-action to mold.  Do you have an anaphylactic response, a rash, vomiting, sneezing, nausea...?  I deal with allergies regularly and often what folks call allergy are simply side-effects not true allergy.

    All of that to say- exposure is one way of knowing if you will react- you just have to weigh the risk of re-action.


    9 years ago on Introduction

    Hmm, seems the old wiring and the new wiring may not be up to code.  Exposed wall wiring should at least be in a hard conduit and no cable restraints on the wiring boxes.  You might end up with smoked cheese and house.

    1 reply

    Reply 9 years ago on Introduction

    You should see some of the other junction boxes!  But, you're right, getting all the wiring up to code is a worthwhile project.


    9 years ago on Introduction

    Ooooo cool !

    I am a fan of the ccchhhhhheeeeeseeeeeeesss too
    I like Jarlsberg the most