Isis and Physioprof aren't the only ones who can cook, you know. I don't get to cook on a regular basis, but every couple of weeks there's some piece of produce just begging to be cooked into deliciousness. This past week, it was a batch of organic Italian plums that came with our produce delivery (my one indulgence).
I wasn't quite sure what to do with so many plums, so I consulted my shelf of cookbooks and decided upon a recipe from a 1950's book on freezing and canning for farm wives. I updated the techniques and downgraded the quantities a bit, and methods and results are below the fold. The conclusion however, has not changed since the 1950s. Plum butter is divine on vanilla ice cream.
Step 1. Cut plums in half, cover with water and boil until skins are tender.

Step 2 (1950s version): Pour plums into strainer, catching liquid, and work plums thoroughly through strainer to create a puree.
Step 2 (2008 version): Start with 1950s version, get impatient. Pull skins off plums, being careful not burn hands. Add remaining pulp to food processor and puree.
Step 3: Add plum puree (and associated liquid) back to pan and boil. Add sugar in appropriate amount. The recipe called for 3 3/4 quarts of uncooked plums = 2 3/4 cups sugar. I started with just over a quart of plums and added just under a cup of sugar. As soon as you add sugar, you must make sure to stir constantly. Watch for splattering hot liquid.
Step 4. Keep boiling and stirring until your plums+sugar reaches a jelly like conistency. Congratulations, you've got plum butter. Can, freeze, or otherwise store as appropriate for the amount you made.

Step 5. Eat with ice cream, on toast, (or by the spoonful).
ScienceWoman is an assistant professor in -ology. She blogs about the intersection of science and real life - primarily based on her first-hand experiences. Her older posts can be found
Alice Pawley is an assistant professor of
Comments
This looks so yum! Way to go Renaissance Woman!
Posted by: Mimi | October 10, 2008 10:24 AM
mmmh, delicous! But why is it called butter?
Posted by: Amelie | October 10, 2008 11:45 AM
Sciencewoman, are you trying to get in on the schtick? If so, I may need to being treating you with the same disdain I treat PhysioProf.
But this looks delicious.
Posted by: Isis the Scientist | October 10, 2008 1:36 PM
This time of year, it's also easy to throw in some green apples or crab apples for pectin, so it will set up as a proper jam without so much boiling.
Italian plum trees are all over my neighborhood, so I've now got several batches of plum butter/jam/sauce in the freezer. If your plums are a bit underripe/sour, and you don't add much sugar, it makes a great condiment - you can mix it with lemon juice or apple cider vinegar and it works more or less like ketchup, except that it's exotic and impressive.
Posted by: Maria | October 10, 2008 3:22 PM
Yum, that looks delicious. My dad had a plum tree in our yard that was his pride and joy, but we just ate them directly from the tree. You'd better lay in a supply of ice cream... :-)
Posted by: LindaCO | October 11, 2008 8:52 AM
Thanks for the motherfucking link, darling!
Posted by: Comrade PhysioProf | October 11, 2008 1:44 PM
Yum! NA swears by peach butter, but plum sounds even better!!
Posted by: unbalanced reaction | October 12, 2008 9:23 AM