On 2019-01-12 11:56 a.m., U.S. Janet B. wrote:
> On Sat, 12 Jan 2019 05:54:47 -0700, notbob > wrote:
>
>> On 1/11/2019 2:09 PM, U.S. Janet B. wrote:
>>
>>> I tried the vinegar in regular milk today as a sub for not having the
>>> real stuff.
>>> Not nice. The taste was not pleasant in the baked biscuits. Well
>>> worth having the powdered buttermilk on hand.
>>
>> Try lemon juice.
>>
>> I suspect you have very good flavor receptors and can tell the diff. I
>> cannot, so I use lemon juice or white vinegar in whole milk. It works
>> as well as powdered buttermilk (IMO).
>>
>> nb
>>
> I tried a leftover biscuit today. They are "sour" to my taste.
> I haven't been without liquid buttermilk in forever (but I was) and
> when I checked my stash of powdered buttermilk in the back of the
> fridge I discovered that it had a date of 2016 on it. :-(
> I will repair these oversights today.
>

If it is kept in the fridge it should be good for years.