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Lactic Cheese
This cheese is not just made with Goat milk but Cow and Ewe milk may also be used to create spectacular cheeses. Lactic Cheese may be one of the oldest and simplest cheeses to be made.
With a little imagination the finishing of the lactic cheese can provide a variety of textures and flavors as you will see in the following page.

The lactic series of cheese are primarily made with little to no rennet and rely primarily on the action of the bacteria converting the milk lactose to lactic acid. When the milk acidity becomes high enough, the milk will coagulate even without the use of rennet. They can range from very moist fresh curd cheeses to somewhat dry small cheeses depending how much draining and drying take place in the initial process.

What is a lactic cheese

Lactic cheese or Acid Set cheese differs from the firmer rennet set cheeses in that they rely primarily on the activity of the bacteria converting lactose to lactic acid causing the proteins to cling together and thus form a curd.

The milk will take much longer to coagulate for a lactic cheese at 16-24 hours and at a much higher acid level of.4-.5% (pH 4.8-5.0) then the rennet set cheese which only requires 10-30 minutes and very low acid levels of .17-.15% (pH 6.5-6.6).

The lactic cheese will result in a weaker curd because the higher acid causes much of the calcium that normally forms firm cheese bonds to run off with the draining whey. As a result only small cheeses can be made and spontaneous drainage is the only means of removing moisture. No pressing can be used for these cheeses.

The lactic curds are also ladled in larger masses for whey drainage and not cut as in rennet set cheese. The lactic curds can either be pre-drained in cloth bags or ladled directly to small molds for draining.

The lactic cheese are normally very fresh tasting high moisture cheeses with a very high lactic acid flavor. The goats milk Chevre is a classic example of this and our cheese here will be focused on making this from cows milk.

A great source of more information on the differences between Lactic and Rennet coagulated cheese can be found in he book "Fabrication of Farmstead Goat Cheese" by Jean Claude Le Jaouen.

 


For the process details here we will include:
2 options for the milk and
2 options for the culture choices.

2 milks:

  1. Milk pasteurized to 176F for 16 seconds
    The reason I have included this milk is that the pasteurization temps that are used by dairies today are beginning to increase. These milks will still work nicely for many cheeses but some extra time needs to be expended to bring the curds together and release the moisture.

    If the milk is processed at higher than 172F there will be problems in forming a good curd. Certain whey proteins have been destabilized and now are getting in the way of the calcium and casein proteins making good strong bonds (sort of like putting several thick sheets of paper between 2 magnets). If you have added the proper amount of rennet and still see a weak curd after waiting 2-3 times the normal coagulation time, then the curd will probably not improve.
    This milk will need some help with drainage and will need to be ladled into a cloth lined strainer and drained for 12-24 hrs before being scooped into forms.

  2. Fresh milk or milk pasteurized at the normal 162F for 16 seconds.
    This is the good milk we would all like to find and work with and with some research it can usually be found in most areas. Please see our "Good Milk" section online

    This milk will form a very nice curd and should drain quite easily. This curd can be easily ladled directly into forms or into the cloth lined strainer for pre-draining if a drier cheese is preferred.

2 cultures:

  1. Chevre
    This culture pack will provide both the bacteria to convert lactose to lactic acid PLUS the small amount of rennet to assist the acid in forming a curd (much less than used in pressed cheese).
    The flavor will be slightly lactic but otherwise quite neutral.

  2. Buttermilk
    This is a more complex culture which not only works on the lactose to lactic acid conversion but also produces a very distinct buttery flavor and very small amounts of carbon dioxide which will leave tiny holes in the cheese. The tiny holes will produce a lighter texture in the finished cheese as well.
    This culture contains no rennet so this will need to be added to the milk after the milk has undergone a short ripening period. The amount of rennet needed is 2-3 drops of single strength rennet per gallon.

A Recipe for making the lactic cheese

Before you Begin:

You will need:

1 gallon of milk (Please note the choices above)
1 packet of either our Chevre or Buttermilk culture
Liquid Rennet if using the Buttermilk culture
A good thermometer
A knife to cut the curds, and a spoon or ladle to stir the curds with.
A colander and butter muslin to drain the curds
Several molds - 6 per gallon. The Chevre or Crottin molds work well for this

Everything needs to be clean and sanitized.


Heating and Acidifying the milk:

Begin by heating the milk to 86F (30C). You do this by placing the milk in a pot or sink of very warm water. If you do this in a pot on the stove make sure you heat the milk slowly and stir it well as it heats.
Some folks like to do this at room temperature but we prefer to raise the milk to 86F first because this is the temperature that the bacteria does best. Traditionally this was also the temperature of the milk shortly after it came from milking.

Once the milk is at 86F the culture can be added. To prevent the powder from caking and sinking in clumps, sprinkle the powder over the surface of the milk and then allow about 2 minutes for the powder to re-hydrate before stirring it in. Please see the information on culture choice above

Acid development and coagulation:

This process uses just a tiny bit of rennet.
If using the Chevre culture, there is no need to add any extra rennet, since we have already added the proper amount of powdered rennet to the culture pack.
BUT
If using the Buttermilk culture you will need to add about 2 drops of rennet to a gallon of milk.

Smell & Taste the sweet milk at this point !

Note: If no rennet was used at all the milk would still coagulate but it would take several hours longer. This tiny bit of rennet speeds up the process somewhat and allows cheese makers to maintain a 24 hour cycle of coagulating, draining and molding.

The milk now needs to sit quiet for about 16-24 hours while the culture works and the acidity coagulates the curd. The thermal mass of this milk should keep it warm during this period. It is normal if the temperature drops to room temperature during this time but do keep it between 68-72F otherwise acid development and coagulation may slow down .

What to look for and how to know when the curd is ready

The primary indication for proper curd development is the observation of clear whey beginning to rise.
The first indication will be small droplets of whey forming on the surface, next you will see small puddles forming as the whey rises, and finally you will see a thin layer of whey over the entire curd mass. You may even note the curd pulling away from the vat edges or forming cracks. It is now ready to cut. Note the photos above.
If your curd does not seem to be set within this time frame, you should let it continue to sit quietly. This may take as much as 36-48 hours for some milks and during some seasons.

Smell & Taste the milk again and note the pronounced acid character. Using your senses here will aid in becoming a better cheese maker.

Note: If using non-homogenized or raw milk, there will be a tendency for the cream to rise excessively. To avoid this you can wait 6-8 hours before adding the rennet while the milk develops acidity. Be careful to add the rennet before the milk begins to thicken. In doing this, the cream will not have time to rise before the milk begins to set. If the milk begins to thicken before adding the rennet, do not add the rennet at all. The milk will take longer to coagulate but will set fine without the rennet.

Releasing the whey and draining the curds:

At this point our milk source will decide how we proceed.

If using a very fresh farm milk or a milk that we know forms a good curd (pasteurized at normal time/temperature and below 172F) we can simply ladle the curds directly to the forms for draining

HOWEVER, if we are using a high temperature pasteurization there will be a tendency for a weak curd and is essential to drain the curds with the butter muslin. The reason for this is that the weak curd structure does not drain well and needs assistance of a mechanical nature.

The curds are carefully ladled into the butter muslin lined colander or draining pan. Then the 4 corners are brought together and the cloth bound curd is hung to drain. The weight of the curd will provide some incentive for draining and the cloth can be opened and the curd gently turned during the draining to make a drier curd. This will take from 18 to 24 hours and longer.

The whey draining from your bag of curds will be very clear and after the finished draining, the curd should seem quite dry and ready for molding.

The curd is now ready to be molded into the forms.

The curd now needs to drain and consolidate in the forms for another 24 hours before turning and salting.

Once the cheese has drained and settled in the molds, the salt can be added.

To do this:

  • Turn the cheese in the mold (moister side will be up).
  • Use a medium grain salt (non-iodized) since a fine grain will dissolve too fast.
  • For cheese using the molds mentioned above, use about 1/4 tsp for the surface of each cheese.
  • Sprinkle evenly over the surface and wait about 2-4 hours for salt absorbtion.
  • Then turn the cheese and repeat, waiting another 2-4 hrs for the salt to be absorbed.

Drying and Finishing

The cheese can now be taken from the molds and dried off for another day.
Note the fan in the photo below which is set on low to provide enough air movement to further dry off the surfaces.

This is also a good time to add any special surface treatments:

  • An herb mix using fresh herbs from the garden chopped fine and sprinkled evenly over the surface. Or dried herbs from the store will add another flavor dimension. I normally do not recommend using fresh herbs but since these are for a fresh cheese eaten within a few days, good clean fresh herbs that have been washed and dried should be fine.
  • Any mix of seeds, berries, chopped chiles, paprika, cocoa, coffee etc. will be fine. Your imagination and taste are your only limitations.
  • Ash can be mixed with the salt to dry out the surface more and allow natural surface molds to develop.
  • The surface can be left as is to allow natural molds to develop such as the geotrichum in the photo below.

Final aging can be anything from a day or two, to several weeks. As the cheese ages the surface will dry down and the paste will become somewhat drier/denser and if the proper molds develop may begin to soften as it ripens near the surface.

The final cheese, ready to eat! Hopefully we have left you with the inspiration to make this for your family and friends. Yum!

 






  Hearing about your wonderful cheese making adventures always brightens up our day. Please feel free to send us stories and maybe even a photo to:
info@cheesemaking.com
 

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Thanks for joining our cheese making family, keep those stories & photos coming. We love to hear from you!

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