Potatoes are the most common side on any menu. But the portion cost is miscalculated in most businesses, because only the raw material price goes into the sum.
What loss items are there?
Fresh potatoes generate four separate losses.
The first is sorting. Rotten, greened and sprouted potatoes are removed; that loss runs 3 to 8 percent, varying with the season.
The second is peeling. Skin and eyes take 15 to 25 percent.
Hand peeling loses more, machine peeling less.
The third is shaping. Uneven ends and small pieces are discarded during cutting: 8 to 12 percent.
The fourth is holding. Peeled potatoes stand in water and lose starch, and can also darken. That loss is 2 to 4 percent.
Total loss runs 30 to 45 percent.
A kilogram of fresh potatoes therefore yields 550 to 700 grams of usable product.
With frozen potatoes all of those losses have already occurred at the producer; the yield is 100 percent.
How is the real unit cost found?
The calculation takes three steps.
Step one: raw material cost per usable weight.
If fresh potatoes cost 20 lira a kilogram and the loss is 35 percent, the usable kilogram costs 20 ÷ 0.65 = 30.8 lira.
Frozen potatoes cost 45 lira a kilogram with no loss; the usable kilogram costs 45 lira.
At this point fresh still looks cheaper.
Step two: labour. Sorting, peeling and cutting a kilogram of potatoes takes eight minutes on average.
At 150 lira an hour, those eight minutes cost 20 lira.
The usable kilogram cost of fresh potatoes rises to 50.8 lira.
Step three: equipment and energy. If a peeling machine is used, depreciation and electricity are added; if not, the labour is higher still.
After that step the frozen product moves ahead.
| Item | Fresh potato | Frozen potato |
|---|---|---|
| Price per kilogram | 20 TL | 45 TL |
| Loss rate | 35% | 0% |
| Cost per usable kg | 30.8 TL | 45 TL |
| Labour (per kg) | 20 TL | 0 TL |
| Total cost per kg | 50.8 TL | 45 TL |
| Oil absorption | 8-12% | 5-8% |
| 150 g portion | 7.62 TL | 6.75 TL |
Why is oil absorption a cost item?
This is the most overlooked line.
Potatoes absorb oil during frying, and that oil enters the cost.
Fresh potatoes absorb 8 to 12 percent; surface moisture and starch increase it.
Frozen potatoes have usually been par-fried and coated in production; absorption falls to 5 to 8 percent.
On a 150-gram portion that is a difference of 5 to 6 grams of oil.
With oil at 80 lira a litre that is 45 to 50 kuruş per portion.
In a business selling two hundred portions a day it comes to three thousand lira a month.
A product that absorbs less oil also extends the life of the oil; starch and moisture accelerate its breakdown.
Less frequent oil changes become a saving of their own.
How large is the cooking loss?
Potatoes lose water during frying and their weight falls.
With fresh potatoes the loss is 25 to 35 percent; the water content is high.
With frozen potatoes it is 15 to 20 percent; some water was already removed during par-frying.
That matters in the portion calculation.
A cooked portion of 150 grams requires 210 grams of raw fresh potato.
180 grams of frozen potato suffices.
That difference sits on top of the per-kilogram calculation and widens the frozen product's advantage.
Portion calculations should be based on cooked weight rather than raw; what the customer sees is the amount on the plate.
What do time and workflow change?
Cost is not only money; time is a resource too.
Preparing fresh potatoes takes a large part of the morning shift.
In a kitchen preparing twenty kilograms a day that is two and a half hours.
That time could have gone to another prep task.
With frozen potatoes preparation time is zero; the product goes from pack to fryer.
The second difference is flexibility. Fresh potatoes are prepared in advance and must sell that day.
If demand falls below expectations the prepared product carries over and its quality drops.
With frozen product only what is needed comes out; there is no waste.
The third difference is dependence on staff. Peeling and cutting ties up one person; in a busy service that person may be needed elsewhere.
What changes on the quality side?
Cost alone does not decide; quality must be weighed too.
The clearest advantage of frozen potato is consistency. Every batch is the same size and gives the same result.
With fresh potatoes size and starch content vary with the season; winter and summer potatoes behave differently.
On crispness the frozen product is generally better; coating technology was developed for exactly this.
On flavour fresh potato has the advantage; the unprocessed product's own taste is more pronounced.
In texture fresh potato gives a softer interior.
The decision depends on how the business positions itself: in fast service consistency comes first, in a business emphasising handmade production fresh product does.
At what threshold does frozen make sense?
Three criteria decide.
The first is volume. In a business selling under fifty portions a day, preparing fresh potatoes is manageable; above that the labour becomes heavy.
The second is labour cost. Where the hourly cost is high, frozen product becomes advantageous quickly.
The third is storage. Frozen product demands freezer space; where space is tight the calculation changes.
A cubic metre of freezer space holds around 350 kilograms of frozen potatoes.
The cost of that space belongs in the sum too: the electricity and depreciation of the freezer.
Weighing all three together, frozen product comes out ahead for most mid-sized businesses.
For very small businesses and those emphasising freshness, fresh potatoes remain sensible.
Can a hybrid model work?
Yes, and it is applied often in practice.
Some items are bought frozen, others fresh.
Chips frozen, for example, with baked potatoes and mash fresh.
The reason is that the loss varies by product.
For mash the shape of the peeled potato does not matter; there is no shaping loss.
For chips even batons are needed and the loss rises.
A hybrid model both optimises the cost and keeps fresh product on the menu.
The decision should be taken line by line; no single general rule fits every product.
The calculation should be reviewed every six months; potato prices fluctuate seasonally and the threshold moves.
