Salt butter at 1-2 teaspoons of salt per pound, worked in evenly after washing, then choose the storage by how long it must last. Salted butter keeps 2-4 weeks in a 50°F cellar, 3-6 months packed in a salt-filled crock, and ghee, made by heating butter until the water has gone and the milk solids can be poured off, keeps 6-12 months in sealed jars at room temperature.
Part of Dairy Production at Scale
Salting and storing butter means adding salt to slow spoilage and choosing a storage method (cellar, salt crock or clarified fat) that matches how long the butter must last.
Water And Milk Solids Are What Spoil, So Each Method Removes Or Shields One
Butter spoils for two reasons: the fat goes rancid, and the water and milk proteins in it feed bacteria and molds. Washing removes most of the buttermilk, salt makes the water that remains hostile to bacteria, cold slows everything, and ghee removes the water and proteins altogether. Which one to use is a question of how long the butter must wait.
Salt By Weight, Not By The Spoonful
The parent article says 1-2 teaspoons of salt per pound. Teaspoons of salt vary with grain size, so check the dose once by weighing. A teaspoon of fine salt is about 6 g (a standard figure from memory, not from this wiki), so 1-2 teaspoons per pound (454 g) is 6-12 g, which is 1.3-2.6% by weight. Dairy Processing gives 1-2% by weight; the two overlap, and weighing the salt against the butter is more reliable than counting spoons.
Work the salt in evenly. Uneven salting leaves unsalted pockets that spoil first.
Salt itself is a managed supply; see Salt Production and Sourcing.
Storage Options
| Method | Keeps | What it needs |
|---|---|---|
| Salted butter in a cool cellar at 50°F | 2-4 weeks | A cellar that really holds 50°F |
| Butter packed in a salt-filled crock | 3-6 months | Salt and a clean crock |
| Ghee in sealed jars at room temperature | 6-12 months | Fuel and a careful clarification |
Dairy Processing quotes 4-8 weeks for salted butter in a cool place. The parent article’s 2-4 weeks is the more cautious figure and is the one to plan on; the other article gives no cellar temperature, so the two cannot be compared directly.
Method
Packing in a salt crock. Press the butter tightly into the crock so no air pockets remain, then cover with a layer of salt. Keep the crock cool and covered. Air and water are the enemies, so the butter must be packed solid.
Making ghee. Melt butter gently, simmer until the bubbling stops (the water is gone) and the liquid is clear gold, then pour off or strain the clear fat from the milk solids that settle. Pour into clean dry jars while hot and seal. Any water left in ghee, or a jar that is not dry, will spoil it.
Common Mistakes
- Counting spoons instead of weighing. Too little salt gives a short life, and too much ruins the taste.
- Storing butter with strong-smelling food. Butter takes up odors.
- Calling a crock cool enough when it is not. A crock in a warm room is not the same as one in a 50°F cellar.
- Putting damp butter into ghee jars. The jar must be dry.
Safety
Water in hot fat erupts
When you make ghee, any drop of water that lands in hot fat spits and can throw burning fat onto skin. Dry every utensil and jar first, keep the heat low, and never leave the pot unattended.
What’s Next
- Learn next: Cheese Making — the other long-keeping dairy store
- Combine with: Cold Storage: Passive Cooling for Perishables — holding butter cool