Recipe Scaler / Resizer

After scaling, save both the original recipe and the new version. Record the scale factor, new yield, pan size, cooking time, date, and any changes you made during testing. In a hotel kitchen, I also note the batch code, supplier, and guest feedback. Do not overwrite the original. Keep it as your master formula, then save scaled versions for 10 portions, 25 portions, or buffet production.

To halve an egg, crack it into a bowl, beat it well, then weigh or measure half. A large egg without shell is about 50 grams, so half is about 25 grams. By volume, that is roughly 2 tablespoons of beaten egg. Do not try to use only the white or yolk unless the recipe says so. Mixed egg keeps the balance of fat, protein, and moisture.

To scale from 4 to 6 servings, use a factor of 1.5. Divide the new yield by the old yield: 6 divided by 4 equals 1.5. Multiply every main ingredient by 1.5. For example, 200 grams flour becomes 300 grams, and 2 eggs becomes 3 eggs. Keep oven temperature the same, but watch cooking time if the food is deeper or in a different pan.

A scaled-up cake often falls because the batter depth, pan size, leavening, or mixing method was not adjusted correctly. If the pan is too deep, the outside sets before the center bakes. Too much baking powder can make the cake rise quickly and collapse. Overmixing also weakens structure. Scale by pan area, keep batter depth similar, and test with a skewer or thermometer before removing.

To triple a recipe, multiply ingredients by 3, but do not blindly triple everything in one bowl. Very large batches mix differently and cook more slowly. Keep pan depth the same, split batter or dough into batches, and add strong spices, chili, salt, and leavening carefully. For baking, use weights, not cups. Make a test batch first if the recipe is for service or sale.

Start by scaling spices with the recipe, then taste and adjust. For mild spices, multiplying directly usually works. For salt, chili, cloves, cinnamon, and strong herbs, begin with about 75 to 90 percent of the calculated amount, cook, then correct. Flavors become stronger as sauces reduce or rest. In hotels, record the final tested amount so the next batch is consistent.

Usually, scaling a recipe does not change the oven temperature. What changes is the cooking time and pan choice. If the food is spread in the same thickness, time may stay close. If the batch is deeper, larger, or crowded, it takes longer. For cakes and roasts, use the correct pan size and test doneness. Temperature controls browning; thickness controls how long heat takes to reach the center.