Change Servings on the recipe with − and +, or tap ½ or ×2. Every ingredient amount updates to match, ranges such as “2–3 tablespoons” included, and “recipe makes” beside the number shows what the recipe was written for. Count and size words change with the amount too, so “1 clove garlic” becomes “2 cloves garlic”; the names of foods stay as the recipe wrote them. The recipe remembers the new amount until you tap the reset arrow next to it.
Amounts written inside the directions, such as “add 2 cups of stock”, stay as the recipe wrote them. Cook Mode reminds you of this while the servings are changed.