Christmas · once a year

Cookie Ratio

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Game guideCookie Ratio: full rules, strategy tips and FAQ

▶ Christmas · Maths

Cookie Ratio

Six festive recipes, six party sizes: gingerbread stars, snowball cookies, hot cocoa, spiced apple punch… For each one, find the scale factor first (new ÷ old), then scale every ingredient before the oven is hot. The factors get trickier as you go, from ×3 to ×1½, ×1¾ and ×½, and spoon amounts tidy up into tablespoons.

6 recipes
Ratios

How to play

Find the factor. Party size ÷ recipe size: a recipe for 6 made for 18 is ×3.
Scale everything. Multiply every amount by the factor. Never add the extra people.
Kitchen units. 3 teaspoons make 1 tablespoon, 1,000 g is 1 kg, and eggs come whole.
Score. 50 for the factor, 100 per ingredient, up to 100 oven bonus for a recipe with no slip. A wrong amount costs one of 3 cookies.

Divide new by old. The factor is party size ÷ recipe size. 18 ÷ 6 = 3, and 21 ÷ 12 = 1¾.
Multiply, never add. Twelve more guests doesn't mean twelve more grams: every amount grows by the same factor.

3 more tips in the Cookie Ratio guide →

Cookie Ratio

Quick tips