When life gives you 4 pounds of kumquats, make cake, curd and marmalade all in one day. Kumquat day.
My boyfriend’s parents cook on a farm near Santa Barbara and sometimes deliver us truckloads of beautiful, organic surplus produce. Today it was gigantic dirt-covered red beets, bright green shishito peppers, perfectly polished mouth popping baby tomatoes, and more fresh green herbs than I could possibly figure out what to do with before they begin to wilt.
Among the loot was also a massive bag of kumquats. Kumquats are a small citrus variety that taste like a lemon, an orange and a lime all at once. They’re the only citrus whose skin is tender and sweet enough to eat, and you must eat the skin! Unlike other citrus, the rind of the kumquat is the sweet part and the inside the tart part.
A single kumquat tree, depending on its size, can produce hundreds, often thousands of the little fruits every year. And so you have people like me, whose lives have suddenly, without warning, been thrown into kumquat production overdrive.
I started with a curd. I once had to make a vegan version of lemon curd for a cake recipe and I actually prefer it and have stuck with it ever since. The coconut milk makes it as creamy as you'd want a curd to be and the mixture thickens up flawlessly with a few spoonfuls of cornstarch. Curd made with kumquats is slightly more puckering than with lemon, and the flavor is really discernibly unique. You can strain out the rinds halfway through the recipe for a more uniform curd, but I love the little flecks of orange and the added texture.
I ended up swirling some of the curd into a loaf cake and jarring up the rest to give away to some curd-deprived vegans (with this recipe you’ll end up with a little extra).
The flavors here aren’t all soft and sweet like you’d expect from a typical loaf cake. You get hit with the unexpected tangy bite from the kumquats immediately. It’s evened out by the sweetness and nuttiness of the cake, but it’s there and it’s interesting. Mixing curd into the center ensures the whole thing is full of moisture – it’s like a built in spread.
I’d never made marmalade with kumquats before, but with over 3 pounds to go, it seemed like the right thing to do. The great thing about marmalade is that because citrus peel naturally contains high levels of pectin and marmalade by definition includes the peel, you don’t need store-bought pectin to help it bind together. The little bits of kumquat get softened into a perfectly tender, almost Sour Patch Kids-like chewy consistency. I added the seeds from a whole vanilla bean for a smoother layer to the flavoring – I often find marmalade too one-dimensionally tart – and for the little black flakes that get set into the gel. I love this recipe, I doubled it this time and I’ll make it again and again.
Were I to make a FOURTH kumquat dish, I would have reduced the marmalade into a glaze and made a kumquat drizzle cake, but – I’m happy to say – kumquat day is over.
KUMQUAT CURD CAKE
KUMQUAT COCONUT CURD
1 cup coconut milk
juice of 1/2 a lemon
30 kumquats, seeded and halved
1/2 cup coconut sugar (regular sugar will work too)
3 tablespoons cornstarch
1 tsp vanilla extract
Heat coconut milk, lemon juice and sugar in a large saucepan over medium heat. Once warmed but not boiling, add kumquats. Stir and simmer, allowing to infuse for 10 minutes.
Transfer kumquats and liquid to a food processor and pulse until kumquats have been chopped to small flecks of orange. Return mixture to saucepan and heat over medium heat. Add cornstarch one tablespoon at a time, constantly stirring for 6-8 minutes until the mixture thickens to a creamy consistency. Remove from heat and stir in vanilla extract. Allow to cool as you make the cake batter.
1 cup (120 grams) whole wheat pastry flour
1/2 cup (120 grams) spelt flour
1 1/2 teaspoon baking powder
3/4 teaspoon fine grain sea salt
3/4 cup (170 grams) canola oil
1/2 cup (120 grams) greek yogurt
1/4 cup (85 grams) honey
2/3 cup (135 grams) natural cane sugar
1 teaspoon vanilla extract
zest of 4 kumquats
1 teaspoon turbinado sugar for sprinkling
Preheat your oven to 350° F. Grease and flour a loaf pan.
Combine flours, baking powder and sea salt in a bowl. In a second bowl, whisk together oil, greek yogurt, honey, kumquat zest, vanilla extract, and sugar. Whisk in one egg at a time until fully incorporated. Pour dry ingredients into wet ingredients and stir until combined.
Pour half of the cake batter into the bottom of the pan. Spread two thirds of the curd over the top of the batter, taking care not to let the curd touch the edges of the pan. Pour the remaining batter over the top of the curd and smooth out the top. Pour the remaining curd over the top of the batter. Using a butter knife, neatly swirl the curd back and forth across the pan, again being careful not to let it touch the pan. Sprinkle sugar in the raw over the top of the loaf.
Bake for 50-60 minutes or until a toothpick comes out clean. Allow to fully cool before cutting into the loaf, as the curd will pour out of the middle unless given time to firm up.
KUMQUAT + VANILLA BEAN MARMALADE
1.5 pounds kumquats, rinsed, seeded and cut into quarters
3 cups water
1 pound granulated sugar
1 vanilla bean, cut in half and seeds scraped out
Rinse, seed and cut kumquats into quarters. It helps to use a sharp knife to both cut the kumquats and poke out their seeds.
Combine kumquats, water, sugar, scraped seeds and shell of the vanilla bean in a large saucepan over medium heat. Bring to a boil and allow to boil for 5 minutes without reducing heat. Continue to boil until the mixture reads 220° F on a cooking thermometer. As a note, I’ve made marmalade without a thermometer and it’s turned out fine…just be sure you get the mixture boiling long enough before turning down the heat.
Return mixture to a simmer, stirring constantly, and cook until it has transformed into a thick gel like consistency. Allow to cool before storing in clean jars. Marmalade will keep for several weeks in the refrigerator (or longer if you use a preserving technique).