Keeping a sugar solution in the fridge
Based on a the coffee questions I've seen, it seems that hot beverage questions are in scope, so here goes mine:
We like keeping iced coffee in the fridge, particularly in the summer. It's easiest to add sugar to the entire batch, but we both like differing amounts of sugar to coffee. Sugar doesn't dissolve in cold liquid very well.
If I make a sugar suspension and put it in the fridge to sweeten the coffee as we drink it, will the mixture stay liquid or will the sugar crystals re-form? If this is impractical, can anyone offer another solution?
Edit: Here's a picture of sugar solution that we've been keeping in the fridge and using. I made it 8 days ago and it's staying in solution quite well.
Best Answer
I do exactly that.
I use a clear plastic squeeze bottles. I fill a mug 2/3 full with sugar, and top up with boiling water, stir, cool, funnel into the squeeze bottle, and keep in the fridge door. The squeeze bottle makes it easier to get the right amount of sugar into your beverage.
I don't even worry about keeping it sealed. There's nothing much to oxidize. And the osmotic pressure of sugar solutions makes it very difficult for pathogens to live. This is why jams and jellies keep forever in your fridge. Like jams and jellies, the first thing you're probably going to see in the way of spoilage is mold. In the case of simple syrup, we're talking dark thready stuff at the bottom of the bottle. This happens about a month out. I chuck it, wash the bottle, and carry on.
On a related note, I have a blog post about iced coffee. And it's kind of a little wrong. Cold-brew coffee is pretty good for making iced coffee, but it's not better than leftover percolated coffee. Seriously. We make hot coffee at my workplace using this cheapo percolator urn. We learned from the reviews on Amazon that we could just pour off the leftover coffee in the afternoon and have excellent iced coffee. And that's exactly what we do. (To be fair, we use Gorilla coffee, so that might have something to do with it, but I think it'd be good with average coffee.)
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Quick Answer about "Keeping a sugar solution in the fridge"
I do exactly that. I use a clear plastic squeeze bottles. I fill a mug 2/3 full with sugar, and top up with boiling water, stir, cool, funnel into the squeeze bottle, and keep in the fridge door. The squeeze bottle makes it easier to get the right amount of sugar into your beverage.Can I keep sugar water in fridge?
Once it cools to room temperature, it's ready. Store any extra sugar water in the refrigerator for up to a week.What will happen if we keep the sugar solution in the refrigerator?
Explanation: A sugar solution prepared for crystallization when kept in a refrigerator will undergo the crystallization process rapidly.How long can you keep sugar water in the fridge?
Sugar water does not stay fresh very long. It lasts just 4-5 days in the refrigerator and can spoil quickly outside depending on how hot it is.Are you supposed to refrigerate simple syrup?
Store the simple syrup in an airtight container, in the fridge, until ready to use. As mentioned above, basic simple syrup can stay fresh up to 4 weeks, however flavor simple syrups need to be used within a week or two.More answers regarding keeping a sugar solution in the fridge
Answer 2
Make a simple syrup. Simply dissolve one to two parts sugar into one part boiling water, cool, and pour into an empty 20oz soda bottle. As long as the sugar is fully dissolved it will remain syrupy, and not recrystallize.
Answer 3
We do this all the time. As long as you don't dissolve so much sugar in it that you've made a super saturated solution, no crystals will form.
For coffee, we make the following simple sugar recipe:
- 140g sugar
- 200ml water
Bring water to a boil, dissolve sugar. Drop into a glass container (we use an olive oil bottle with pourer), allow to cool at room temperature until reasonably cool, and put in the fridge.
You can make vanilla syrup by adding 5ml (1 tsp) to the solution right after the sugar has dissolved after bringing to a boil. You want to make sure that you have it well above 140F to boil out the alcohol that is present in vanilla extract or it will taste a little "off".
Adding room temperature sugar to boiling water drops the temp to around 180F, which is the perfect time to drop in the vanilla extract.
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Images: Erik Mclean, Nataliya Vaitkevich, Kevin Malik, Kai-Chieh Chan