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Shrimp or prawn crackers are savory snacks common in Asian countries. Believed to have its origins in West Malaysia, this snack is part of daily common cuisines or as a midday snack. Prawn cracker manufacturing has a strong demand, with Indonesia exporting 1.648 million kg as of May 2019.

Which shrimp crackers equipment do you need?

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Simplifying shrimp slicing in prawn cracker manufacturing

Shrimp slicing is a critical process in prawn cracker manufacturing. How you slice your crackers affects oil absorption and crispiness of the final product. Thicker slices absorb lesser oil compared to thin slices since they have a higher moisture content. Thinly sliced crackers have a faster cooking time.

During prawn cracker manufacturing, the starch you use for dough making affects slicing, specifically on its elasticity. For example, using tapioca starch, although gluten-free, makes your shrimp cracker dough more elastic and difficult to slice. As a remedy, you may add reducing agents such as L-cysteine and sodium bisulfite to soften it and make it easier to slice.

With this, cutting machines should be appropriate to the properties of your product. You must carefully consider the dough cutting speed. Setting a higher speed results to thicker shrimp cracker slices while the reverse is true at lower speed. You may lubricate the blades to better aid the slicing process of the shrimp cracker dough.

Frying in and fatting out your shrimp crackers

Cooking your shrimp crackers requires that they are deep fried for 10 to 15 seconds to ensure crispiness while reducing oil absorption. You may do this using either a deep fryer (for non-continuous processes) or conveyor fryers (for continuous processes). You can also substitute the frying oil with healthier alternatives, such as sunflower, canola, peanut, and avocado, to increase your shrimp crackers’ nutritive value. However, you should be careful of the produced free fatty acid (FFA) when using these. Normal FFA should only range from 0.5 – 0.8% during frying; excess levels would result to the development of rancidity and off-flavors on your crackers.

After frying, de-fat the shrimp crackers using de-fatting belts and air knives. Removing excess oil from frying provides additional value to your shrimp crackers while promoting crispiness and extending their shelf-life. If not done, this can make your crackers soggy while also making them prone to rancidity and to develop off-flavors. De-fatting belts work by shaking your freshly cooked shrimp crackers, causing excess oil to be shaken off. On the other hand, air knives apply pressurized air to forcibly remove adsorbed oil on the surface of your crackers.

Not a healthier alternative (but it could be)

Contrary to belief, shrimp crackers are not healthy snack alternatives. A study in Ireland has shown that a serving of shrimp crackers from the usual Chinese takeout contains 608 calories, a third of an adults’ daily calorie intake. For comparison, a serving of corn chips and potato chips contain 160 calories each.

It is then important to consider healthier ingredients and establish value-adding processes. You may consider using alternative oils, such as coconut and olive oil, or using de-fatters and air knives to rid of excess oil, producing healthier shrimp crackers.

Processing steps involved in shrimp-crackers making

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