Most of the trees in my yard are fruit trees, and many of them are coming into full maturity and bearing potential. I was looking forward to a succession of harvests this summer, when fate intervened in the form of one small, scrawny squirrel. She showed up under my birdfeeder last winter, looking like she was near death. It was fun to see her crouched outside the kitchen door eating seeds, and I even put out a few special treats for her. She grew fat and sleek, and in late spring she reappeared after a disappearance with five baby squirrels bouncing around behind her. They had a very high adorable factor, and when they destroyed some green fruit I did not make too big a fuss about it. Then they disappeared, and I began to see squirrels around the rest of my neighborhood. Then, predictably, mother squirrel showed up with six new babies. The remaining fruit was ripe, and they harvested it all. I mean all of it. A large prune plum tree, strung with plums so heavily that the branches looked like blue rope, was stripped in a couple of days. I was able to eat about five peaches before they were gone. Apples gone. Cherries gone. I was reduced to buying local fruit at the farmers market, a sad comedown for somebody who has been tending fruit trees for the last decade.
Fortunately, it turns out that squirrels don’t like quinces. My tree was loaded, and I set out to discover what could be done with quinces. I made a ton of chutney, and made some membrillo to serve with cheese, but my favorite use is as a base for a flourless chocolate torte. The original idea came from one of my favorite food sites, Food 52, and was based on eggplant. You can read it here: https://food52.com/recipes/77833-ian-knauer-s-chocolate-eggplant-cakes. I made it once as written and liked it, but I felt that it could be improved upon. Quinces have an aromatic overtone and a lot of pectin, which helps this cake set.
You will need a special ingredient, black cocoa powder. I use Onyx brand. The cake is not the same without it. I keep it lower-carb with the use of special sweeteners which can only be obtained online: Sola sweetener and Truly Zero sucralose. If you choose to use other sweeteners from the grocery store, be aware that they are probably not really low carb at all, because most of them contain ingredients that can raise your blood sugar. Also, the texture and mouthfeel may be drastically affected. If you eat sugar, you can forget those two ingredients and sweeten it with sugar to taste. Otherwise, the only significant carbohydrates present are from the chocolate and quince, and quince is not a sweet fruit.
Start with one large or two smaller quinces. Scrub the fuzz off with a scrub brush, but don’t peel them. Most of the pectin is in the peel. Cut them in quarters, cut the core out, and steam them for about 25 minutes or until easily penetrated with a fork. Preheat oven to 300 degrees and line an 8” cake pan with parchment paper. In a double boiler or (very carefully) in a microwave at lower power, melt 2 4oz bars of Baker’s unsweetened chocolate and one full-size bar of excellent dark chocolate, 84-85% cacao content. Put the soft quince flesh in the blender and grind to a perfectly smooth paste with enough heavy cream to keep the mixture blending smoothly, usually about a cup. A Vitamix does a great job of this. Quinces are pretty fibrous, so make sure it is blended smooth. Scrape the mixture out into a mixing bowl. It will already be stiffening from all the pectin, so use a heavy wooden spoon for the rest of the mixing. Beat in eight egg yolks, 1/2 teaspoon salt, 1/2 teaspoon baking powder, 2 teaspoons vanilla, a few scrapes of freshly grated nutmeg, 1/2 cup Sola sweetener, and 7 drops Truly Zero sweetener. Otherwise, sweeten with sugar to taste. Beat in the melted chocolate, and last, beat in half a cup of black cocoa powder. It will be really stiff by now and need a fair amount of muscle power. Taste, only if you are okay with raw egg, and adjust the sweetness if needed. This amount of sweetener gives a semisweet result.
Scrape into the parchment-lined pan, spread around neatly (it won’t spread in the oven, so get it the way you want it,) and bake at 300 until a clean knife comes out almost clean. Then-this is important-let it sit for at least 8 hours before you cut it, so it can firm up. Serve at room temp or slightly warmed, Never cold, with or without whipped cream, and enjoy. My motto is “Chocolate is food, not dessert,” and I have eaten a wedge of this cake for lunch on occasion.
I have frozen a number of one-torte portions of blended quince flesh and cream, ready to make this cake all winter.