I will! May I ask one more question? I’ve been reading that ganache doesn’t keep well at room temperature. How long can they stay safe? Or do I need to keep them refrigerated? I don’t have many people eating them, so I’m worried I might poison someone if they don’t get eaten quickly. Thank you all for the help and kind words!
I cannot tell you specifically how to handle food, I can only provide you with the industry information so that you can use your best judgment.
Understanding basic food safety will help you decide how to handle your cookies.
This applies to all food:
Food spoilage comes down to Water Activity (Aw).
Aw is the measure of available water in a food product. Available water and actual water content are not the same.
Water molecules bond with other molecules. Food becomes contaminated with microbes when they bond with the available water molecules in food.
However water molecules in food will also bond with other molecules, not just microbes. Therefore, not all the water in your food is available to microbes.
So it is the available water that is of concern in food safety.
So Aw refers to the available water that will actively bond with microbes and not the total water in a food.
Aw is measured from 0 to 1.0.
0 = no water activity.
1.0= maximum water activity
Ph level is important. But that’s a whole post in of itself. For this discussion Aw in general is enough.
The only way to know specifically the Aw of food product is to have it analyzed in a lab, or purchase a very expensive meter.
But there’s some general knowledge of Aw in foods commonly produced in the baking industry.
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The following applies to ganache
Dark chocolate ganache has a Aw of about 0.86. That’s an average. The actual level will depend on a number of factors.
White chocolate ganache has a slightly lower Aw.
The federal government standards for the cottage food industry is pH ( ≤4.6), water activity (≤0.85).
So an Aw of 0.85 or below is required for an individual to produce food at home and sell it to the general public. Not that you’re producing for sale; I just put that standard out there to give you a point of reference.
The federal standard means foods with a water activity of 0.85 or less will develop bacteria much more slowly than foods with an Aw above 0.85. So the government feels it safe For a home based business to produce such foods and sell them to the general public.
Now back to ganache. As I mentioned, dark chocolate ganache is around 0.86, slightly above the 0.85 threshold set by the government.
So refrigeration for extended storage is necessary. But the ganache can be safely left out at room temperature for a couple of hours.
There are also things you can do to lower the Aw in ganache and increase shelflife.
- boil cream: boiling kills bacteria and it evaporates some of the water in the cream. just let it cool some before pouring over chocolate.
- use an invert sugar*: invert sugar molecules will bind with available water molecules, making less water available to bacteria. Invert sugar will not alter the flavor of the chocolate ganache and give it a nice mouthfeel. use 2% - 3% invert sugar to the total weight of your recipe. example, if total weight of chocolate and cream is 250 grams. 250 x .02 = 5. So use 5 grams. add it to the cream when heating.
- use an liquor with at least 40% alcohol. Alcohol inhibits bacteria growth. Mix the alcohol in last. It will look curdled, just mix the ganache well to emulsify.
- do not whip the ganache as whipping will aerate and expose the ganache to microbes i. the air.
- when stored in a bowl, place cling wrap directly on surface of ganache to prevent air exposure.
*invert sugar is a liquid sugar. Examples are cooked sugar syrup, corn syrup, glycerol and/or sorbitol. You can make it yourself.
how to make invert sugar
http://www.chefeddy.com/2009/11/invert-sugar/