Sour Plum Soup

Ingredients

• 2 litres water
• 25 g black jujubes
• 25 g smoked plums
• 30 g hawthorn slices (raw)
• 100 g yellow rock sugar
• 2 g liquorice root
• 4 g aged tangerine peel
• 1 g red cardamom
• 3 g dried osmanthus flowers

Method

Sour Plum Soup is a two-stage herbal-infusion built on the principle of extracting flavour intensity from a modest weight of ingredients. You're after a concentrated, balanced liquid — tart from the plums and hawthorn, clean from the liquorice, with enough sweetness to amplify rather than mask the sourness.

Rinse all ingredients except the osmanthus flowers and rock sugar under cold water. This removes dust and surface debris without opening the cells. Soak the rinsed botanicals in 1.5 litres of room-temperature water for at least 2 hours — the soak begins hydration and starts leaching soluble compounds before heat accelerates the process. Bring the soaked mixture to a rolling boil over medium-high heat, then cover and reduce to low. Simmer for 40 minutes. The sustained heat extracts the colour, acidity, and mineral notes; you'll see the liquid shift from pale to amber-brown as the plums and hawthorn release their tannins and sugars. Strain through a fine sieve, pressing gently on the solids to coax out the last infusion without crushing them into the broth.

Pour the hot first infusion over the rock sugar in a bowl, stirring until the sugar dissolves completely. Rock sugar dissolves faster when the liquid is hot because sweetening relies on kinetic energy to break the crystal lattice. Return the spent botanicals to the pot with 600 ml fresh water. Bring to a boil over high heat, cover, reduce to medium, and simmer for 20 minutes. This second infusion extracts remaining flavour from the exhausted solids — a standard technique in asian-cuisine for wringing maximum value from delicate, expensive ingredients. Strain again.

Combine the sweetened first infusion with the second infusion while both are hot. Let the mixture cool to between 60 and 70 degrees Celsius — this is crucial. Add the dried osmanthus flowers only once the temperature has dropped to this range; heat above 80 °C will scald the flowers and turn their delicate floral character musty and bitter. Stir gently, cover, and allow to cool completely to room temperature, then refrigerate for at least 3 hours. The cold infusion deepens the osmanthus perfume and melds the flavours into a cohesive whole.

Strain out the osmanthus flowers before serving. Pour chilled into small cups and sip slowly, letting the interplay of sour, sweet, and floral notes develop on the palate.