Costing a Loaf Line by Line
- Convert a baker's percentage formula into exact batch ingredient weights
- Cost every ingredient line using delivered prices you have collected yourself
- Calculate ingredient cost per unit and identify which ingredient dominates your cost
You cannot price what you have not costed, and you cannot cost a loaf by guessing at the flour. Costing starts with the formula, because the formula tells you exactly how many grams of each thing go into each loaf. Everything else is multiplication.
Work it through with a published formula. In baker's percentage, flour is always 100 percent and every other ingredient is a percentage of the flour weight. A published white pan bread formula reads: flour 100, water 62, yeast 3, salt 2, sugar 4, shortening 3, defatted milk solids 2. Add those up and the total formula percentage is 176.
Now scale it to a real bake. You want 20 loaves scaled at 900 g of dough each, which is 18,000 g of dough.
- Flour needed = (18,000 divided by 176) times 100 = 10,227 g. Round to 10,230 g.
- Water = 10,230 times 0.62 = 6,343 g.
- Yeast = 10,230 times 0.03 = 307 g.
- Salt = 10,230 times 0.02 = 205 g.
- Sugar = 10,230 times 0.04 = 409 g.
- Shortening = 10,230 times 0.03 = 307 g.
- Milk solids = 10,230 times 0.02 = 205 g.
Check the total: about 18,006 g. That is your batch.
Now price it. And here is the rule that makes this module honest: this course does not know what anything costs where you live, and it will not pretend to. The numbers below are written in an illustrative unit, CU, and they are invented purely so you can see the arithmetic working. Cross them out and write your own.
Use the delivered price, not the shelf price. Delivered price is what you paid, plus transport to your door, plus any loss in handling such as a torn bag. If you buy a 50 kg bag of flour, divide the delivered cost of that bag by 50 to get your price per kilogram.
Illustrative prices per kilogram: flour 1.00, yeast 6.00, salt 0.60, sugar 1.40, shortening 3.00, milk powder 8.00. Water is treated as effectively zero here, though if you buy or truck water, put it in.
- Flour: 10.230 kg times 1.00 = 10.23 CU
- Yeast: 0.307 kg times 6.00 = 1.84 CU
- Salt: 0.205 kg times 0.60 = 0.12 CU
- Sugar: 0.409 kg times 1.40 = 0.57 CU
- Shortening: 0.307 kg times 3.00 = 0.92 CU
- Milk powder: 0.205 kg times 8.00 = 1.64 CU
- Batch ingredient cost = 15.32 CU
Divide by the loaves the batch actually produced. Not the loaves you planned. Count them after cooling. 15.32 divided by 20 = 0.77 CU of ingredient per loaf.
Look at what the arithmetic just told you. Flour is 10.23 of 15.32, which is 67 percent of the ingredient cost, even though the fancy ingredients cost far more per kilogram. That is a consequence of these particular illustrative prices, not a law. There is no reliable published benchmark for what share flour should be of a bakery's ingredient cost, so do not adopt 67 percent as a target. Run your own numbers and find your own share. But the pattern is worth knowing: in a lean bread, the cheap ingredient you buy in bulk usually dominates, and a small percentage change in the flour price moves your cost more than a large change in the yeast price.
Test that. If flour rises 10 percent to 1.10 CU per kilogram, the flour line becomes 11.25 CU, the batch becomes 16.34 CU, and cost per loaf becomes 0.82 CU, up 6.5 percent. If yeast rises 10 percent instead, the batch rises by only 0.18 CU and cost per loaf moves less than one percent. Now you know which supplier's price list to watch.
One more discipline. Ingredient cost is not full cost. It is the first of five lines. Fuel, packaging, labour, overhead and wastage are still to come, and a baker who prices from ingredient cost alone is selling at a loss with a smile on their face.