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Basic Kitchen Ratios
A recipe is one answer. A ratio is the formula behind every answer. When you know that pie dough is always 3 parts flour, 2 parts fat, 1 part water, you can make one crust or twelve, swap butter for lard, or fix a dough that feels wrong, all without looking anything up. Professional kitchens run on ratios because ratios scale.
The core ratios
| Ratio | Parts | Breakdown | Example | Why it matters |
|---|---|---|---|---|
| Pie dough | 3 : 2 : 1 | 3 parts flour, 2 parts fat, 1 part water | Example: 12 oz flour, 8 oz butter, 4 oz ice water makes two 9-inch crusts. | The spine of pies, tarts, and quiche. Fat cut in cold keeps it flaky. |
| Biscuits | 3 : 1 : 2 | 3 parts flour, 1 part fat, 2 parts liquid | Example: 12 oz flour, 4 oz butter or shortening, 8 oz milk or buttermilk. | Bake hot (425 F). Handle lightly: tough biscuits are worked biscuits. |
| Bread | 5 : 3 | 5 parts flour, 3 parts water, plus 2% salt and 1% yeast by flour weight | Example: 500 g flour, 300 g water, 10 g salt, 5 g yeast. | The base of lean breads. Bread flour and long rises improve structure. |
| Fresh pasta | 3 : 2 | 3 parts flour, 2 parts egg (by weight) | Example: 300 g flour, 200 g egg (about 4 large eggs). | Rest the dough 30 minutes before rolling. Semolina adds bite. |
| Sugar cookies | 1 : 2 : 3 | 1 part sugar, 2 parts butter, 3 parts flour (by weight) | Example: 8 oz sugar, 16 oz butter, 24 oz flour. | Cream butter and sugar first, then add flour gently to keep cookies tender. |
| Shortbread | 1 : 1 : 2 | 1 part sugar, 1 part butter, 2 parts flour (by weight) | Example: 4 oz sugar, 4 oz butter, 8 oz flour. | A leaner cousin of the traditional Scottish ratio (which runs 1:2:3). Mix, chill, slice, and bake low and slow. |
| Vinaigrette | 3 : 1 | 3 parts oil, 1 part acid (by volume) | Example: 6 tbsp oil, 2 tbsp vinegar or lemon juice. | Standard dressing math. Season with salt, mustard helps it hold together. |
| Roux | 1 : 1 | 1 part fat, 1 part flour (by weight) | Example: 2 oz butter, 2 oz flour thickens about 2 cups of liquid to a sauce. | Cook longer for darker color and deeper flavor (gumbo, espagnole). |
| Mirepoix | 2 : 1 : 1 | 2 parts onion, 1 part carrot, 1 part celery | Example: 2 cups onion, 1 cup carrot, 1 cup celery. | The aromatic base of countless soups, stews, and sauces. |
| Custard | 2 eggs : 1 cup | 2 eggs per 1 cup of milk or cream | Example: 4 eggs to 2 cups of milk for a standard baked custard. | Bake in a water bath just until set; carryover heat finishes the center. |
| Simple syrup | 1 : 1 | Equal parts sugar and water, by weight or volume | Example: 1 cup sugar, 1 cup water. | Simmer until clear, then cool; the base for cocktails, sorbets, and brush-on cake syrups. |
| Pancake batter | 2 : 2 : 1 | 2 parts flour, 2 parts liquid, 1 part egg (by weight) | Example: 8 oz flour, 8 oz milk, 4 oz egg (about 2 large). | Rest the batter 10 minutes; lumps are fine, a perfectly smooth batter is overworked. |
Ratios are by weight unless marked otherwise. Volume measures for dry ingredients vary by how they are packed, which is why serious baking is done on a scale.
Working with ratios
Pick the part that matches your situation. If you have 250 g of butter and want shortbread, the 1:1:2 ratio says you need 250 g of sugar and 500 g of flour. The ratio does the recipe math for you, whatever quantity you start from.
Scaling up or down is where ratios shine. To double a bread dough, keep 5:3: add twice the flour, twice the water, and twice the salt and yeast. The only things that do not scale linearly are mixing time, rise time, and pan size, which follow volume and heat, not weight.
Where ratios bend
Ratios are starting points, not laws. Enriched breads add butter, sugar, and egg to the 5:3 backbone. A vinaigrette for delicate greens might go 2:1; one for hearty kale might go 4:1. Eggs vary in size, flours vary in protein, and humidity changes how dough feels. Treat the ratio as the center of the target and adjust by feel.
The habit to build is simple: when a dish works, note the ratio you actually used. Over time you collect a personal formula book that no search box can replace.