Equipment
Ingredients
Produce
- 300 g kumquats, washed and stems removed
- 15 ml lemon juice, freshly squeezed
Syrup Base
- 250 g granulated sugar
- 250 ml water
- 50 g light corn syrup
Aromatics
- 1 cinnamon stick
- 1 star anise
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 54 kcal
- Protein
- 0 g
- Carbohydrates
- 14 g
- Fat
- 0 g
- Fiber
- 1 g
- Sugar
- 13 g
- Sodium
- 3 mg
- Saturated Fat
- 0 g
- Monounsaturated Fat
- 0 g
- Polyunsaturated Fat
- 0 g
- Potassium
- 25 mg
- Calcium
- 10 mg
- Iron
- 0.1 mg
- Magnesium
- 3 mg
- Phosphorus
- 3 mg
- Zinc
- 0.0 mg
- Vitamin A
- 2 mcg
- Vitamin C
- 6 mg
- Vitamin E
- 0.0 mg
- Vitamin K
- 0 mcg
- Vitamin B6
- 0.0 mg
- Thiamin
- 0.01 mg
- Riboflavin
- 0.01 mg
- Niacin
- 0.1 mg
- Folate
- 2 mcg
- Water
- 21 g
Sources: Aggregated Public Data, USDA FoodData Central
Method
Using a wooden skewer, pierce each kumquat entirely through the center from stem to end. This allows the syrup to penetrate the fruit and prevents them from bursting during cooking.
Bring a medium saucepan of plain water to a rolling boil at 100°C/212°F. Add the pierced kumquats and blanch for exactly 2 minutes. Drain the water completely. This crucial step removes the harsh bitterness from the rind and softens the skin.
In the same empty saucepan, combine the granulated sugar, water, light corn syrup, cinnamon stick, and star anise. Place over medium heat and stir gently until the sugar is fully dissolved and the mixture reaches a boil.
Reduce the heat to low, maintaining a gentle simmer at roughly 90°C/195°F. Carefully add the blanched kumquats to the syrup. Cook uncovered for 40 to 45 minutes, stirring occasionally with a slotted spoon.
Remove the saucepan from the heat. Stir in the fresh lemon juice to balance the sweetness and add a pectin boost. Allow the kumquats to cool in the syrup for 2 hours at room temperature.
Transfer the cooled kumquats and their spiced syrup into sterilized glass jars. Ensure the fruit is entirely submerged in the liquid to maximize shelf life.
Chef's Notes
- The inclusion of corn syrup acts as an invert sugar, chemically preventing the sucrose molecules from recrystallizing, which is essential for a smooth, glossy preserve.
- Do not discard the leftover syrup once the kumquats are eaten. It makes an exceptional sweetener for winter cocktails, hot teas, or a glaze for roasted meats.
- For an adult variation suitable for gifting, add a 15ml splash of Grand Marnier or Cointreau to the jars just before sealing.
- If you notice seeds floating in the syrup during the simmering process, simply skim them off with your slotted spoon.
Storage
Refrigerator: 3 months — Keep fully submerged in syrup in an airtight sterilized jar to prevent mold.
Troubleshooting
Sugar syrup crystallizes into a grainy texture
Cause: Agitation while boiling or omitting the corn syrup invert sugar
Fix: Add a splash of water and reheat gently until crystals dissolve
Prevention: Ensure the corn syrup is included and avoid vigorous stirring once the syrup comes to a boil
Kumquat skins are tough and rubbery to chew
Cause: Skipped the blanching step or boiled the fruit too vigorously in the syrup
Fix: Cannot be fixed
Prevention: Always blanch raw kumquats first, and ensure the syrup stage is a gentle simmer, not a rolling boil
Kumquats shriveled and collapsed
Cause: Fruit was not pierced sufficiently, preventing syrup exchange
Fix: Cannot be fixed
Prevention: Pierce completely through the fruit at least once with a skewer
Cultural Context
Kumquats are native to China, where their golden color has long symbolized prosperity and good luck, especially during the Lunar New Year. The technique of candying whole fruits (fruit confit) was perfected in France to preserve seasonal harvests. This recipe marries those traditions, resulting in a festive winter confection that has become a beloved edible gift during Christmas.
