Machine Production of Taro Balls and Sweet Potato Balls: Dividing, Shapes, and Starch Ratios
Taro balls (芋圓) and sweet potato balls (地瓜圓) are toppings that dessert shops, shaved ice shops, and shaved ice stalls in Taiwan prepare in large quantities every day. The traditional method is to mash steamed taro or sweet potato, add starch, knead it into a dough, roll it into logs, and cut them piece by piece. That works fine in small quantities, but at larger volumes the person cutting gets tired, sizes start to vary, and when cooked some are done while others are still hard. This is exactly what a dividing machine is meant to solve.
What Machine Is Used to Cut Taro Balls?
Taro balls and sweet potato balls are usually made on a dividing machine: the dough is placed in the hopper, the machine extrudes it into a rope of fixed thickness, and then cuts it at a set length. Because each piece has the same cross-section and length, the weight is the same.
Dong-Yih Machinery's DY-528MS Taro Ball and Sweet Potato Ball Dividing Machine is this type of machine. Specifications from our website:
- Output: 3,000–12,000 pieces/hour
- Weight per piece: 10 g–30 g or heavier
- Power: single-phase 220V, 1.6 kW (three-phase 380V/415V/440V must be custom-ordered)
- Suitable for: sweet potato balls (蕃薯圓), taro balls, sweet potato balls (地瓜球), mochi, mooncake filling, mung bean paste, red bean paste, sun cake filling, Dajia pastry (大甲酥餅) filling, taro pastry filling, Ningbo rice cakes, Korean rice cakes, and dividing cookie dough bars of all kinds
The advantage of this type of machine is that one person can run it, hourly output is several times that of hand cutting, and every piece is the same size, so cooking time is easy to control.
Can They Be Made Square or Round?
The shape of taro balls comes from how they are cut:
- Cut from a rope: Extruded into a rope and cut into sections, giving cylindrical or nearly cube-shaped pieces. Jiufen-style taro balls, common in Taiwan, mostly have this shape, which is also the best fit for a dividing machine.
- Round balls: After cutting, the pieces still need to be rounded, either by hand or with rounding equipment.
The cross-sectional shape of the rope depends on the design of the outlet (nozzle or die). Which shapes can be made, and whether round balls can come out directly, depends on the model and accessories. The DY-528MS listing on our website does not include shape options; if you need a specific shape, we recommend calling us directly.
How Starch Ratios Affect the Machine
The basic recipe for taro balls is cooked taro (or sweet potato, pumpkin, or purple sweet potato) paste plus starch, usually tapioca starch (cassava starch) or sweet potato starch, sometimes with a little sugar. The proportions directly affect machine performance:
- Too little starch: The dough is wet, soft, and sticky; the extruded rope slumps, the cuts stick to the blade, and the pieces stick to each other.
- Too much starch: The dough is hard and dry, resistance to extrusion is high, the surface cracks easily, and the texture is hard after cooking.
- Inconsistent taro quality: The water content of taro varies with season, variety, and steaming time, so the same recipe may be just right today and too wet tomorrow. Many shops standardize their steaming method and hold back some starch during kneading for final adjustments.
- Temperature: When starch is added to hot taro paste, some of it gelatinizes and the dough becomes stickier; kneading after the paste has cooled completely gives a different texture and machine behavior.
For machine production, the dough is best "kneaded until smooth, not sticky to the touch, and able to hold a shape." When using a dividing machine for the first time, we recommend trying a batch with your usual recipe first, then fine-tuning based on how it extrudes.
After Cutting
- Dust to prevent sticking: Dust the cut taro balls with a layer of tapioca starch so they do not stick together in a clump.
- Frozen storage: In mass production, the pieces are usually dusted after dividing, spread out flat to freeze, and then bagged. For frozen transport, under Article 8 of the Regulations on Good Hygiene Practice for Food (食品良好衛生規範準則), the ambient temperature of frozen compartments must not be higher than -12°C.
- Cleaning: Taro paste and starch easily get stuck in the extrusion outlet and cutter, so disassemble and wash them at the end of the day. Stop the machine and cut the power before disassembling; Article 57 of the Occupational Safety and Health Facilities Regulations (職業安全衛生設施規則) also requires that machinery be stopped, locked out, and tagged when it is cleaned, inspected, or adjusted.
For sweet potato balls (QQ balls), see Machine Production of Sweet Potato Balls.
FAQ
Q: What machine cuts taro balls faster?
A: A dividing machine. It extrudes the dough into a rope and cuts it by length, so the pieces are uniform in size. Dong-Yih's website lists the DY-528MS at 3,000–12,000 pieces/hour.
Q: Are taro balls from a dividing machine square or round?
A: A dividing machine directly cuts segments from a rope; for round balls, they need to be rounded afterward. The cross-sectional shape depends on the outlet design.
Q: What should I do if the taro ball dough is too sticky to run on the machine?
A: Usually the starch ratio is too low or the taro paste is too wet. Add more tapioca or sweet potato starch and knead until it no longer sticks to your hands before running it on the machine.
Q: How large can each piece be on the DY-528MS?
A: Our website lists 10 g–30 g per piece or heavier.
Q: What power does the DY-528MS need?
A: Single-phase 220V, 1.6 kW; three-phase 380V/415V/440V must be custom-ordered.