How to make a good jam without the hassle of canning
It took me an embarrassing number of years to overcome my (unreasonable) paranoia about making jam that would somehow give my friends and family botulism. The nasty, if rare, illness — which can lead to paralysis, death, etc. — is caused by a toxin generated by bacteria that can thrive in improperly canned food.
By the time I mastered canning and eventually slid into an annual groove, I had a baby and no longer had the time to go through the traditional water-bath canning process.
That’s why refrigerator jam has now become my (sorry!) jam. It’s an easy, no-stress and quick method that bypasses the whole practice of having to sterilize and boil a bunch of jars.
“There’s no judgment if you don’t want to do the water-bath canning process,” says Marisa McClellan, the three-time canning cookbook author who blogs at Food in Jars.
[You bought a ton of summer produce at the farmers market. This is what you cook with it.]
Refrigerator jam is not only a means to an end. It can help you manage your overflowing purchases of peak summer fruit that somehow managed to ripen faster than you could eat them, and therefore prevent food waste. Making small batches of jam is “just a fun way to beat the system,” McClellan says. “It’s empowering. It’s a great way to buy low and sell high” on excess produce that is about to go.
Ready to try it? Here’s how to get jamming.
Pick the right fruit. In the height of summer, you can’t go wrong with stone fruit. Peaches and nectarines are especially ideal because they tend to be cheaper and ripen quickly, McClellan says. You can use almost any fruit you like, though at other times of the year, you want to avoid very firm fruit such as apples or quince that won’t soften in the short cooking time. Aim for four cups of fruit cut in a moderate dice. Bigger pieces can be mashed a bit once the fruit starts to break down in the skillet. You don’t have to worry about peeling most fruit, although McClellan suggests you do so with peaches since the skins don’t break down particularly well. (The best way to peel peaches is to first boil them briefly until the skins begin to burst, then dunk them in ice water. The skins should slip off easily.)
As to the state of your fruit, very ripe is fine. But “truly rotten fruit — turning it into jam isn’t going to make it better,” McClellan says. “It still has to be fruit you’re interested in eating.” You can cut away dinged parts you don’t want. If, however, the fruit smells boozy or fermented, toss it in the compost bin and not in your jam mixture.
Sweeten it. McClellan recommends going with a 2-to-1 ratio of fruit to sugar. So I used 4 cups of fruit and 2 cups of sugar for the jam you see pictured in this post (the yield of the jam was about 2 cups). If your fruit is very ripe and sweet, you can use closer to a 3-to-1 ratio. If you choose something like honey instead of granulated sugar, reduce the amount by a third, since it is a more concentrated sweetness, McClellan says.
[The cool thing to do with berries past their prime]
Flavor to taste. You can certainly stick with the simplicity of fruit and sugar. Or you can start to experiment with different flavors. One of McClellan’s favorite cheats is to use a teaspoon of pumpkin pie spice. It’s a great way to use that jar you probably only pull out once a year anyway, plus it saves you the work of measuring out a bunch of different spices. Try a splash of almond or vanilla extract just before the jam finishes cooking. Alcohol — bourbon or amaretto would both be lovely — would work the same way. Put whole spices (cinnamon sticks, star anise) in at the beginning and remove once the jam finishes cooking. Incorporate crushed red pepper flakes before cooking if you want a jam that is sweet and spicy to, say, serve with cheese.
[Chop, chop! And make relish, the quick condiment your summer cooking deserves.]
Get cooking. “The goal is hot and fast when you’re making these small batches of jam,” according to McClellan. Using a wide skillet encourages quick cooking and evaporation of moisture. A stainless-steel skillet is perfect (she loves Revere Ware picked up at the thrift store). Enameled cast-iron works well, too. Stay away from regular cast-iron, though, because it is “reactive,” meaning it can impart off flavors to the jam. Nonstick isn’t ideal either, McClellan says, because the coating can be prematurely aged by the heat at which you need to cook the jam.
What heat is that? Typically high, she advises, although if your stove top is really powerful, you may want to dial the temperature back to medium-high or even medium. The amount of time you want to cook the jam will vary depending on the vessel, the ripeness and moisture content of the fruit, and how much and what type of sweetener you’re using. A good rule of thumb is 8 to 15 minutes, though to be sure you should look for one major cue: The jam, when stirred — a silicone spatula is a good way to go, McClellan says — should create a trail that does not close up right away (see the photo above). My batch of peach, apricot and cherry jam took 15 minutes on the nose to set properly.
Store it. There’s no need to sterilize whatever you want to put the jam in, as with water-bath canning, but it should be clean. Glass jars, the type you use for canning or even cleaned jars that previously held store-bought jam, are great. McClellan also likes lidded Pyrex containers. You can even use plastic so long as you let the jam cool first before pouring it in to avoid melting anything.
A refrigerator jam isn’t going to last forever. While you don’t need to worry about botulism (the bacteria only thrive in an anaerobic, or oxygen-free, environment), mold is a possibility, as with any open food. As long as you are scrupulous about not getting other food or “nasty bits” in the jam, McClellan says, it should last a month in the refrigerator. For long-term storage, you can freeze the jam, making sure you leave sufficient space at the top of the container to account for expansion as the water in it turns to ice.
Enjoy in many ways. You can obviously use jam as, well, a jam — spreading on toast, waffles, English muffins, scones and what have you. McClellan also suggests using it in a homemade vinaigrette and as part of a marinade or glaze for meats. Spicy versions can be substituted for tomato sauce on a pizza. You can even toss the fruit for your favorite cobbler with a mixture of jam and granulated sugar, instead of using all sugar.
And with all that under your belt, who knows what will be next. Small batches of chutney? Refrigerator pickles?
“Once you start dipping your toe into this small-batch preserving world,” McClellan says, “you start to wonder, ‘What else can I do?’ ”
More from Voraciously:
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