Litchi, dragon fruit and jamun as café refresher and sorbet bases: colour, aroma and what to put on the spec
Café menus are going colourful and floral. Ube lattes, rose espresso tonics and purple coolers are the photos that travel. For a café, a dairy or an ice-cream maker, the practical question is which fruit bases deliver that look and aroma in a refresher or a sorbet, and what to ask a supplier before you commit. This page covers three Indian-relevant fruits, litchi, dragon fruit and jamun, with what the research says and the spec points that follow. It gives concepts, not formulations.
📸 Why colour and aroma lead now
The Economic Times reported on 4 October 2026 that Google searches for ube in India started accelerating in April and hit an all-time high in August, with Telangana, Karnataka, Gujarat, Chandigarh and Goa showing the highest interest between June and August. It quoted GlobalData's Q1 2026 survey of 21,000 respondents in 42 countries: more than 60% of Gen Z and millennials use social media to discover products in new flavours. Restaurant India's May 2026 report adds that many cafés are reducing sugar and want drinks that taste refreshing rather than overly sweet. A fruit base that brings colour and aroma lets a drink stand out without more sugar.
⚖️ The three bases side by side
| Base | What it brings | Research note | Watch-out | Concept uses |
|---|---|---|---|---|
| 🤍 Litchi | Floral, sweet aroma; pale, clear look | Geraniol, nerol and linalool among key odorants (J Food Drug Anal, 2018) | Delicate aroma; short Indian season (late May for Shahi litchi) | Sparkling refreshers, litchi-rose sorbet, iced tea |
| 🐉 Red dragon fruit (kamalam) | Vivid magenta from betacyanins | Light degrades betacyanin; ascorbic acid helps retain it (J Food Sci Technol, 2015) | Mild flavour; needs a partner fruit | Pink lemonade-style coolers, sorbet swirls, smoothie bowls |
| 🟣 Jamun | Deep purple from anthocyanins; tart, astringent taste | Anthocyanin stability depends on pH, heat and light (Food Prod Process Nutr, 2024) | Shade shifts with acidity; astringency | Kala khatta-style refreshers, jamun sorbet, purple ripples |
🤍 Litchi: aroma first
In a GC-olfactometry study of 'Sweetheart' lychee, 31 key aroma-active compounds were identified; geraniol (sweet, floral) had one of the highest flavour dilution factors, followed by compounds including furaneol, nerol and linalool. Sensory panels scored floral, tropical fruit, peach and honey notes highly. That floral profile is why litchi pairs with rose and green tea, and why it suits a clear sparkling refresher where aroma does the work. For seasons and Indian menu examples, see Litchi rose, kokum and kala khatta sorbet concepts.
Spec question: how is aroma retained through processing and frozen storage, and does the supplier have sensory data for the base in a water-based sorbet?
🐉 Dragon fruit: colour that needs protecting
Red-fleshed dragon fruit gets its magenta from betacyanins, pigments characterised in Hylocereus fruit flesh by Wybraniec and Mizrahi (2002). Wong and Siow's 2015 study of red-fleshed dragon fruit juice and concentrate found that light degraded betacyanin, that added ascorbic acid stabilised it, and that among the conditions tested, pH 4.0 and mild pasteurisation retained the most. The flavour is mild, so dragon fruit usually works as a colour and texture partner for litchi, lime or passion fruit. India also grows it: see our kamalam guide.
Spec question: what colour retention does the base show in your drink or sorbet, under display lighting, across its shelf life?
🟣 Jamun: India's purple
Jamun (Syzygium cumini) is rich in anthocyanins. A 2024 review in Food Production, Processing and Nutrition covers their extraction, stability, characterisation and use in food systems, and discusses stability factors including pH, temperature and light. Kala khatta, a jamun-led flavour, is already familiar to Indian buyers from golas and coolers (see our sour fruits guide).
Spec question: what shade does the base give at your product's acidity, and how is astringency balanced for a refresher?
Colour support. Buyers sometimes ask about black carrot as a partner for purple shades. A 2022 review describes black carrot anthocyanins as largely acylated, and acylated anthocyanins as more stable in beverages, and a study in yoghurt found the colour stayed acceptable for 15 days refrigerated. Any colouring ingredient goes on the label.
📋 What to put on the spec
- Fruit and ingoing percentage. If the fruit is named or pictured on the final pack, the Labelling and Display Regulations can require its percentage.
- Format. Pulp, puree, fruit preparation or concentrate. See Fruit preparation vs pulp, puree and jam.
- Brix, acidity and pH, so you can predict colour and sweetness in your drink.
- Colour and aroma stability data in a model of your product.
- Food category. FSSAI's Appendix A puts water-based sorbets in category 3.0 and dairy frozen desserts in 1.7; a café beverage base sits elsewhere. Tell the supplier which one you are making.
- Storage and shelf life, frozen, chilled or ambient.
For coffee-shop applications, see Fruit preparations for coffee and café drinks.
Litchi brings floral aroma, dragon fruit brings magenta betacyanins that need protecting from light, and jamun brings anthocyanin purple that shifts with acidity. Ask for fruit percentage, Brix and acidity, colour stability in your product and the FSSAI category before you lock a café refresher or sorbet base.
Sources
- The Economic Times, 4 October 2026: Meet ube, the purple yam hoping to become India's next matcha
- Restaurant India, May 2026: How cafés are experimenting with seasonal beverage menus
- Feng et al., Journal of Food and Drug Analysis, 2018: Characterization of key aroma-active compounds in lychee
- Wybraniec and Mizrahi, Journal of Agricultural and Food Chemistry, 2002: Fruit flesh betacyanin pigments in Hylocereus cacti
- Wong and Siow, Journal of Food Science and Technology, 2015: Effects of heat, pH, antioxidant, agitation and light on betacyanin stability in red-fleshed dragon fruit juice
- Kaur et al., Food Production, Processing and Nutrition, 2024: Syzygium cumini anthocyanins: biological activities, extraction, stability and utilisation in food systems
- Vidana Gamage et al., Journal of Food Science and Technology, 2022: Sources and relative stabilities of acylated and nonacylated anthocyanins in beverage systems
- Baria et al., Journal of Food Science and Technology, 2021: Colouring properties and stability of black carrot anthocyanins in yoghurt
- FSSAI: Appendix A, food category system
- FSSAI: Labelling and Display Regulations, 2020, compendium
Hero photo: "ARS Litchi chinensis" by Peggy Greb, USDA ARS, Wikimedia Commons, public domain. See Credits.
Questions
Why are cafés looking at colourful fruit bases now?
Because discovery is visual. The Economic Times reported on 4 October 2026 that Google searches for ube in India reached an all-time high in August, with Gujarat among the states showing the highest interest, and quoted GlobalData's Q1 2026 survey of 21,000 people in 42 countries: more than 60% of Gen Z and millennials use social media to discover products in new flavours. Dragon fruit and jamun give a similar purple-pink impact from fruit.
Does dragon fruit keep its colour in a drink?
It needs care. Wong and Siow's 2015 study of red-fleshed dragon fruit juice and concentrate found light degraded betacyanin, while added ascorbic acid stabilised it, and identified pH 4.0 and mild pasteurisation as the best of the conditions they tested for retaining betacyanin. Ask your supplier for colour data in your own drink or sorbet, stored the way you sell it.
Is jamun colour stable?
Jamun's purple comes from anthocyanins. A 2024 review in Food Production, Processing and Nutrition covers their extraction, stability and use in food systems, and discusses stability factors including pH, temperature and light. Expect the shade to vary with the acidity of the finished product, and test it in your base.
What should a refresher or sorbet base spec include?
The fruit and its ingoing percentage, Brix and acidity, the format (pulp, puree, preparation or concentrate), storage temperature and shelf life, colour stability data, and the FSSAI category the base is designed for. If litchi, dragon fruit or jamun is named or pictured on the final pack, the Labelling and Display Regulations can require its ingoing percentage.
Can black carrot help support a purple colour?
It is one option buyers ask about. A 2022 review in the Journal of Food Science and Technology describes black carrot anthocyanins as largely acylated, a form more stable in beverages than many non-acylated fruit anthocyanins, and a study in yoghurt found black carrot colour remained acceptable for 15 days under refrigeration. Any colouring ingredient must be declared on the label.