Star fruit, with its unique star-shaped slices and subtly tart flavor, is a surprisingly versatile fruit. Often enjoyed fresh, its tangy sweetness lends itself beautifully to jams and preserves, adding a delightful twist to traditional spreads. This recipe for Sweet and Sour Star Fruit Jam (Mứt Khế Tàu), a popular treat during Vietnamese Tet celebrations, showcases the star fruit's potential, transforming it into a vibrant and flavorful preserve perfect for spreading on toast, crackers, or even using as a unique glaze for desserts. The vibrant yellow color and slightly tangy sweetness make it a delightful addition to any breakfast or snack time.
This recipe offers a simple yet effective method for creating a delicious star fruit jam, perfect for both experienced cooks and beginners alike. Ready to transform this often overlooked fruit into a culinary masterpiece? Let's dive into the step-by-step process to create your own batch of this irresistible Sweet and Sour Star Fruit Jam.
Tools Needed
- Freezer
- Fan
- Basin
- Pot
Ingredients
- Star fruit: 1 kg
- Sugar: 400g
- Betel nut: 2 tablespoons
- Salt: 1/2 teaspoon
- Succinic water (for red color): 200ml
- Water: 2 liters
- Lime water
Step-by-Step Instructions
Step 1. Prepare Star Fruits and Sugar Mixture
- Select dark green star fruits. Freeze them overnight. After freezing, use a fan to melt the ice. Collect the water released from the star fruits.
- Mix 400g sugar, 2 tablespoons of betel nut, 1/2 teaspoon salt, and 200ml of succinic water. Soak the betel nut in 2 liters of water for an hour, then use only the clear water.
- Squeeze out excess water from the thawed star fruit. Soak the star fruits in the clear betel nut water until they sink.
- Squeeze out the water again from the soaked star fruits.




Step 2. Marinate and Boil Star Fruits
- Marinate the squeezed star fruits in the sugar mixture overnight. Mix occasionally to ensure even soaking.
- Add water to the marinated star fruits and bring it to a boil for 15 minutes. Then add the star fruit mixture and simmer over medium heat, stirring occasionally.


Step 3. Simmer and Thicken the Jam
- Simmer until the sugar water thickens and there is little water left. Avoid overcooking to prevent burning.

Step 4. Cool and Finish
- Drain the jam in a basket to allow excess water to drip. Allow to cool completely for the color to develop.

Read more: Vietnamese Sponge Wedding Cake: A Step-by-Step Guide
Tips
- Use dark green star fruits for a crunchy texture.
- Betel nut helps to preserve the star fruit's crispiness.
- Marinate the star fruits overnight for better color and flavor absorption.
- Reduce the heat to medium while simmering to prevent burning.
- Don't overcook the jam; it should be slightly moist.
Nutrition
- Calories: approximately 250-300
- Fat: 0.5-1g
- Carbs: 60-70g
- Protein: 0.5-1g
FAQs
1. Can I use different types of star fruit for this recipe?
Yes! While the typical yellow star fruit works best, you can experiment with other varieties. Just be aware that the sweetness and tartness might vary slightly, affecting the final taste of your jam.
2. How long will the Sweet & Sour Star Fruit Jam last?
Properly stored in sterilized jars in a cool, dark place, your jam should last for several months. Make sure the jars are completely sealed to prevent spoilage.
This Sweet & Sour Star Fruit Jam is a delightful addition to your Tet celebrations or any time you crave a unique and flavorful treat. The vibrant color and tangy sweetness make it a perfect accompaniment to numerous dishes and snacks. Enjoy the rewarding experience of making this delicious jam, and savor the taste of tradition!