Perfect Lotus Seed and Longan Sweet Soup: Tips & Recipe Guide

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Written By Hot Thai Restaurant

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Imagine diving into a bowl of Lotus Seed and Longan Sweet Soup, a traditional dessert that’s as intriguing as it is delicious. Originating from the vibrant culinary landscape of China, this sweet treat combines the subtle elegance of lotus seeds with the refreshing sweetness of longan fruit. It’s not just a dessert; it’s a piece of cultural heritage that soothes the soul and delights the palate.


This recipe pairs the nutty essence of lotus seeds with the sweet, aromatic taste of dried longan. Begin your delightful cooking journey with these wholesome ingredients.

Lotus Seeds

  • 100 grams of dried lotus seeds
  • Water for soaking

First, ensure to rinse the lotus seeds thoroughly under running water. Soak them in water overnight or for at least 8 hours to soften them and reduce cooking time.

Dried Longan

  • 80 grams of dried longan

Dried longan adds a distinctive sweetness and a floral fragrance to the soup. Before adding them to the soup, make sure to rinse the longan properly to remove any dust or impurities.

  • 6 cups of water
  • 100 grams of rock sugar (adjust based on your sweetness preference)
  • A few slices of ginger (optional, for added warmth)

The ginger slices are optional but recommended if you enjoy a hint of spice that complements the sweetness of the soup, soothing your palate with every spoonful.

Equipment Needed

To prepare the Lotus Seed and Longan Sweet Soup effectively, you will need several kitchen tools. Here’s a list of equipment that will help you achieve the perfect consistency and taste:

  • Medium-sized pot: Choose a pot that can hold at least 4 quarts of liquid, as this will be your main cooking vessel for boiling the lotus seeds and longan.
  • Fine mesh sieve: This is essential for rinsing the lotus seeds thoroughly. As they can be dusty, a good rinse ensures a clean taste.
  • Spoon or ladle: You’ll need this to stir the ingredients and eventually serve your sweet soup.
  • Measuring cups and spoons: Accuracy is key in getting the right balance of sweetness and flavor, so make sure to use measuring tools.
  • Knife and cutting board: If you decide to add ginger for an extra zest, you’ll need a knife and board to slice it finely.

Preparation Steps

Ready to make this delicate and flavorful Lotus Seed and Longan Sweet Soup? Follow these detailed steps to prepare your ingredients properly before you begin cooking.

Cleaning and Prepping Lotus Seeds

  1. Begin by sorting through the lotus seeds. Remove any discolored or broken seeds to ensure a consistent, high-quality dessert.
  2. Rinse the seeds under cold running water using a fine mesh sieve. This washes away impurities and any dusty residues from the seeds.
  3. Soak the cleaned lotus seeds in a bowl of water for at least 2 hours, or overnight if possible. Soaking helps to soften the seeds, reducing cooking time and enhancing their texture.
  4. After soaking, drain the lotus seeds. If you find any seeds with a green sprout in the center (the bitter germ), remove it with a small knife or your fingertips.
  1. Gently rinse the dried longan under cold water to remove any dust or particles. After rinsing, soak them in a separate bowl of warm water for about an hour to rehydrate, which makes them plumper and enhances their sweetness.
  2. If you choose to add ginger for an extra zesty flavor, wash a small piece of ginger root thoroughly. Peel it and thinly slice or mince it according to your preference.
  3. Measure out the required amount of rock sugar. If the pieces are too large, you can break them down into smaller chunks using a kitchen mallet or the back of a heavy spoon. This step ensures that the sugar dissolves more evenly throughout the cooking process.

Cooking Instructions

Follow these detailed steps to bring the delightful Lotus Seed and Longan Sweet Soup to life, perfecting this traditional Chinese dessert with ease.

Cooking Lotus Seeds

Start by placing your pre-soaked and cleaned lotus seeds into a medium-sized pot. Cover them with fresh water, ensuring there is about an inch of water above the seeds for ample cooking space. Bring the water to a boil over high heat, then reduce the heat to medium-low, allowing the seeds to simmer gently. This process should take about 20 to 25 minutes. The lotus seeds are done when they become tender and display a slightly translucent appearance. Be sure to stir occasionally to prevent sticking and ensure even cooking.

Adding Longan and Sweeteners

Once the lotus seeds are tender, add the rinsed and rehydrated dried longan to the pot. Stir in the broken pieces of rock sugar to your taste preference; typically, about half a cup should suffice for a subtly sweet flavor. If you decided to include ginger for an additional layer of flavor, add the thin slices now. Increase the heat to bring the mixture to a light boil, then immediately lower it to achieve a gentle simmer. Let the soup cook for an additional 10-15 minutes, occasionally stirring until the rock sugar has completely dissolved and the longan has softened, blending their flavors beautifully with the lotus seeds. Serve warm for a comforting experience or allow to cool and serve chilled for a refreshing treat.

Serving Suggestions

Enhance the enjoyment of your Lotus Seed and Longan Sweet Soup by considering a few delightful serving suggestions.

Garnish Options

To elevate the visual appeal and taste of your dessert, consider garnishing with a few carefully chosen additions:

  • Fresh Mint Leaves: A sprig of mint not only adds a splash of color but also introduces a fresh, aromatic kick to the sweet soup.
  • Toasted Coconut Flakes: Sprinkling toasted coconut flakes atop the soup adds a delightful crunch and nutty flavor that contrasts beautifully with the soft textures of lotus seeds and longan.
  • Edible Flowers: For a festive or special occasion, edible flowers such as marigolds or pansies can make your dessert visually stunning and party-ready.
  • Warm: Serving this soup warm is perfect for colder weather or when you need a comforting and soothing treat. The warmth intensifies the sweetness and aroma, making it a perfect winter dessert.
  • Chilled: In warmer months, try serving your soup chilled for a refreshing dessert. Cooling it in the refrigerator for a few hours allows the flavors to meld together beautifully, offering a rejuvenating treat on a hot day.

Make-Ahead Tips

Preparing Lotus Seed and Longan Sweet Soup in advance can save you time and enhance the flavors, making it a perfect dessert for both impromptu gatherings and planned events. Here are some tips to help you make this delightful soup ahead of time.

Soaking Seeds and Longan Overnight

Start by soaking the lotus seeds and dried longan overnight in separate bowls of water. This extended soaking period softens these ingredients, reducing the cooking time the next day and ensuring that they are perfectly plump and tender.

Pre-cooking and Storing

You can pre-cook the lotus seeds and longan up to two days in advance. Once you’ve boiled them with water, rock sugar, and optional ginger slices, allow the soup to cool completely. Transfer it to an airtight container and refrigerate. This resting period allows the flavors to meld together, creating a more cohesive and rich taste.

Quick Refresh Before Serving

When ready to serve, simply reheat the soup gently on the stove. If the soup appears too thick after refrigeration, you can adjust its consistency by adding a bit of hot water. This step revives the soup and ensures it is evenly warm throughout.

Garnishing Before Serving

Keep the garnishes fresh by preparing them closer to the serving time. Sprinkle freshly chopped mint leaves, toasted coconut flakes, and vibrant edible flowers right before serving to maintain their texture and color.

By following these make-ahead tips, your Lotus Seed and Longan Sweet Soup will not only be ready when you need it but will also tantalize the taste buds with its enhanced flavors and delightful freshness.


You’re now equipped to delight your guests with the aromatic and refreshing Lotus Seed and Longan Sweet Soup. By following the tips provided you can prepare this dessert ahead of time ensuring it’s not only delicious but also convenient for any occasion. Don’t forget to add those final touches of mint leaves coconut flakes and edible flowers right before serving to elevate the visual appeal and taste. Enjoy the perfect blend of tradition and ease at your next gathering with this exquisite Chinese dessert.

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