Scaling Rules: What Scales Linearly?
Can you simply double everything in a recipe? Usually, yes—but for professional results and very large batches, some ingredients follow different rules.
The Linear Standard
Flour, sugar, fats, and liquids scale linearly (1:1). If you double the recipe, you double these. This represents 95% of your recipe's mass.
The Non-Linear Exceptions
- Yeast & Leavening: When scaling up massively (e.g., 10x), you may need less leavening than a linear scale suggests because the thermal mass of the dough retains heat better, speeding up fermentation.
- Salt & Spices: Strong spices and salt can become overwhelming in large batches. Start with 80% of the linear scale for salt specifically if moving beyond 4x batches.
- Surface Area: If you scale a recipe but keep it in a single large pan, the evaporation rate changes, often requiring a slight decrease in bake temperature and an increase in time.
Pro Scoping
Use our Baker's Percentage Calculator to scale recipes based on flour weight. This is the "gold standard" for professional scaling.