Two or three times a year, I pack up a big box of jam and mail it off to my sister and her family in Austin, TX. While Raina knows the fundamentals of jam making (and I know she has at least two cookbooks that could show her how), my mom and I easily (and happily) meet the bulk of her fruit spread needs.
In the last shipment, one of the jars I sent was a squat little half pint of concord grape jam. I’d made it as a test batch sometime last fall and hadn’t thought much about it beyond assuming that my nephew might dig it. When Raina reported back on the winners, the thing she raved about most was the grape jam. They ate through it in record time and were all a little sad to hear that there wasn’t even a drop more.
So when concord grapes came into season this fall, I made a point to pick some up to make another batch of jam for Raina and her crew. I started with 2 pounds of concord grapes. I gave them a quick rinse, and popped them in a saucepan with 1/4 cup of water. I set the pan on the stove and brought it to a simmer. I let it go for a few minutes, just until the grapes popped.
Once the grapes where soft, I poured them into a food mill that I’d fitted with the finest screen and milled them through. This is the step that makes this preserve more of a jam than a jelly. It’s not going to have a ton of texture from the skin, but some gets through and gives the finished product a little more body.
Once I couldn’t mill any more, I measured out the pulp. In my case, I had a little more than 3 1/2 cups, but your results will vary. I poured the pulp into a low, wide pan and added 1 1/2 cups of granulated sugar (roughly half the volume of pulp) and the juice of half a lemon. Then I cooked it until it was thick (times vary, use your judgment).
Once the jam was done, I funneled it into two half pint jars (there was a little leftover for the fridge) and processed them in a boiling water bath canner for ten minutes. They sealed perfectly and will be in my checked luggage when I head for Austin later this month to meet my new nephew (!!!). He was born at 7:59 this morning and everyone is well.