Series: Ruhlman's Ratios. That's the ratio for cookie dough: 1 part sugar, 2 parts fat, and 3 parts flour. Biscuit dough is 3:2:1 or 3 parts flour, 2 parts liquid, 1 part fat. Broken down into thirty-three ratios and suggestions for enticing variations, preparing food goes from craft to art.all without a recipe.