I was at the grocery store a couple weeks ago, and noticed a kind of orange that I had never seen before called the Cara Cara. I found out that it's a type of navel orange that's a cross between an orange and a grapefruit. This gives the flesh a similar color to a pink grapefruit, but gives the skin the look of a normal navel orange.
I decided that the color of the flesh paired with the color of the skin would make a really nice-looking marmalade! Because Cara Caras are sweeter than normal oranges and have lower acidity, I added a couple of lemons to brighten it up a bit and add a tangy flavor.
After cooking down the Cara Caras and lemons and adding sugar (though the oranges are sweet, it IS marmalade after all!), the mixture was ready for canning. Luckily, there was some marmalade leftover so I could taste it right away! I thought it turned out great. You can really taste the flavor of the Cara Caras but the lemons add a nice zing of tartness.
Cara Cara Orange Marmalade
(adapted from Martha Stewart)
*6 Cara Cara oranges: 4 oranges peeled, peels cut into 1/3-inch pieces, flesh seeded and coarsely chopped; 2 oranges quartered, thinly sliced, and seeded
*2 lemons: quartered, thinly sliced, and seeded
*1 1/2 quarts cold water
1) Bring fruit, peels, and water to a boil in a large saucepan. Cook for 5 minutes. Turn off heat, cover, and let cool. Refrigerate for 8 hours (or up to 1 day).
2) Freeze a plate. Uncover citrus mixture, and bring to a simmer over medium-high heat. Cook until thickest peel is tender, about 20 minutes. Measure mixture, and return to pan. For each cup of mixture, add 3/4 cup sugar.
3)Bring mixture to a boil, stirring often. Cook until mixture registers 220 degrees to 222 degrees on a candy thermometer, about 20 minutes. To test for doneness of marmalade: Drop a spoonful on frozen plate. If marmalade has a slight film when pushed with a finger, it's done. If it spreads out and thins immediately, continue cooking, and test again after a few minutes. Transfer marmalade to airtight containers, cover, and let cool at room temperature. Refrigerate overnight before serving. (Marmalade will keep, covered and refrigerated, for up to 1 month.)