Onam Upperi (Kerala Banana Chips)

Onam Upperi (Kerala Banana Chips)

Onam Upperi (Kerala Banana Chips) is the iconic crispy centerpiece of the traditional Onam Sadya feast. Placed at the top-left corner of the banana leaf, these snacks represent Kerala’s agricultural heritage, centered around the indigenous Nendran plantain.
​1. Types of Onam Upperi

TypeKey IngredientsCharacteristics
Kaya Upperi / Ethakka UpperiRaw Nendran plantain, coconut oil, salt water, turmericWafer-thin golden round disks, crisp and lightly salted.
Sharkara Upperi / Sarkara VarattiThick-cut plantain chunks, jaggery syrup, dry ginger (chukku), cardamom, cumin, rice flourThick, crunchier crescent/cube chips coated in a hardened, spiced jaggery shell.
Nalukanda UpperiRaw Nendran plantain cut length-wise into quartersThicker, extra-crunchy plain salted chips served in traditional Sadya meals.

2. Infrastructure & Production Facility Requirements
​Whether setting up a traditional cottage unit (e.g., Kudumbashree / artisanal bakery) or a commercial manufacturing facility, the unit requires specific infrastructure zones:
​A. Raw Material & Prep Area
​Raw Plantain Handling Yard: Well-ventilated storage space for fresh, raw green Nendran plantains.
​Washing & Soaking Vats: Food-grade stainless steel (SS 304) tanks with running water and turmeric solution to wash off banana latex (paal) and prevent oxidation/browning.
​Peeling & Slicing Workstations: Ergonomic SS preparation tables equipped with high-capacity mandoline slicers (for thin chips) or mechanical rotary dicers/cutters (for uniform Sharkara Upperi cubes).
​B. Frying & Processing Line
​Deep Frying Station: Heavy-duty traditional brass/bronze Urulis or SS continuous deep fryers fitted with LPG/biomass burners or steam heating coils.
​Temperature Controllers: Digital oil temperature monitors to maintain precise frying heat (160°C–180°C) without burning the coconut oil.
​De-oiling Centrifuge: Centrifugal oil extractors to spin off excess coconut oil, ensuring longer shelf life and low-grease texture.
​C. Jaggery Coating & Seasoning Line (For Sharkara Upperi)
​Steam-Jacketed Tilting Kettles: Used to melt dark cane jaggery (pahu vellam) to a 1-string/ball consistency.
​Coating Drums & Cooling Conveyors: Motorized SS rotating drums to evenly toss fried plantain cubes into hot jaggery syrup, followed by a dusting of roasted rice flour and powdered spices.
​Cooling Trays: Large perforated SS cooling tables to allow the jaggery shell to set hard without clumping.
​D. Packaging & Quality Infrastructure
​Nitrogen-Flushing Band Sealers: Form-fill-seal (FFS) or pouch sealing machines equipped with Nitrogen gas flushing to prevent oil oxidation and maintain freshness for 3–6 months.
​Hygiene & Storage Zone: Epoxied food-safe flooring, fly-catchers, air curtains, and climate-controlled storage for packaged goods.

​3. Frequently Asked Questions (FAQs)

​Q1: Why is the Nendran banana variety mandatory for authentic Kerala chips?
A: Unlike standard table bananas, raw Nendran plantains have a high starch content and low moisture density. This structural firmness ensures maximum crispness during deep frying without turning soggy.

​Q2: Why is coconut oil essential for frying Onam Upperi?
A: Coconut oil provides the distinct traditional aroma and smoke point suited for South Indian frying. Its medium-chain fatty acids also stabilize the chips, giving them their characteristic crunch and flavor profile.
​Q3: How is Sharkara Upperi prevented from becoming sticky during storage?

A: Three factors keep it dry and crunchy: boiling the jaggery syrup to a “hard ball” consistency, frying the banana cubes until thoroughly crisp prior to coating, and dusting the coated pieces with roasted rice flour and dry ginger powder to absorb remaining moisture.

​Q4: What is the standard shelf life of traditional Onam Upperi?
A: Homemade or non-nitrogen-packed upperi stays fresh in an airtight container for 2 to 4 weeks. Commercial nitrogen-flushed packages have a shelf life of 3 to 6 months.

​Q5: Where are chips served on the Onam Sadya leaf?
A: They are placed on the top-left corner of the plantain leaf alongside Pappadam and small banana (Rasakadali) before any rice or curries are served.