In baking, your cost depends on two things the recipe does not tell you: how many pieces really come out, and how long you tie up the oven. The recipe says 20 loaves; you get 18 you can sell, because one overproved and one came out misshapen. Dough loses weight in the oven. And you only have one oven: if a bake takes it for an hour, that hour is not available for anything else. If you cost from the recipe yield instead of the real one, every piece costs more than you think.
Where cost slips away in a bakery
- Real yield. Broken, burnt or misshapen pieces, dough left in the bowl, the one you taste. The batch cost gets spread over what you sell, not what you planned.
- Oven and energy. Every bake uses gas or electricity, whether the oven is full or half empty.
- Mixing, shaping and decorating time. In cake work the decorating can take longer than the bake.
- Moving prices. Flour, butter, eggs and chocolate change price often, and your recipe still has the price from three months ago.
- What does not sell today. Fresh bread does not wait. What is left at close is waste.
Worked example: a bake of sourdough
Your recipe makes 20 loaves. In practice, after proving and baking, you have 18 you can sell. The batch costs:
| Item | Per batch |
|---|---|
| Ingredients (flour, salt, starter feed) | $16.00 |
| Your time: 2.5 h × $20 | $50.00 |
| Oven energy | $6.00 |
| Batch total | $72.00 |
Each loaf also goes in a paper bag with a label at $0.25. You sell at $8.00.
With the recipe yield (20):
- Cost per loaf: 72.00 ÷ 20 = 3.60, then 3.60 + 0.25 = $3.85
- Margin: (8.00 − 3.85) ÷ 8.00 = 51.9%
With the real yield (18):
- Cost per loaf: 72.00 ÷ 18 = 4.00, then 4.00 + 0.25 = $4.25
- Margin: (8.00 − 4.25) ÷ 8.00 = 46.9%
Two lost loaves per bake take five points off your margin. Now look at time: each loaf sold leaves you 8.00 − 4.25 = $3.75. Per batch that is 18 × 3.75 = $67.50 for 2.5 hours, or $27.00 per kitchen hour. That number lets you compare sourdough with brownies or cakes and decide what to bake when there are not enough hours.
The numbers that matter most
Real yield per recipe. Count the good pieces in each batch for three or four bakes and use the average. The guide on recipe yield and how to measure it shows a simple way. Write it on your standard recipe card, with weights in grams rather than cups.
Contribution per kitchen hour. What a batch leaves you divided by the hours it takes. It is the best way to rank products when the oven or your hands are the limit. The guide on profit per kitchen hour goes into it, and the one on which products to keep, push or drop helps you act on the result.
Batch size. Heating the oven, setting up and cleaning take about the same time for 10 loaves as for 20. Bigger batches lower the cost per unit until leftovers start to grow. Read how batch size changes your cost per unit.
Energy per bake. You do not need lab precision. Divide your monthly gas or electricity for the oven by the number of bakes. The guide on allocating overhead to products shows how.
Price of your main ingredients. Flour, butter and eggs move everything. Check their price each time you buy and recost when one jumps. The guide on how often to update your costs gives simple rules.
How to keep track
One sheet per product with the recipe yield, the real yield of each bake, minutes of work and what was left at close. Next to it, the prices from your receipts for your five most expensive ingredients. With a month of records you know which product pays most per hour and which one you are selling close to cost.
Do it with the calculator
The food cost calculator costs one recipe at a time and saves nothing, so note the result or copy the link. Enter the pieces the recipe makes, the waste as a percentage (2 out of 20 is 10%), the ingredients, the bag as packaging and the minutes per batch. It returns the cost per unit at your real yield and what you earn per kitchen hour.