How this works

A cookie is a formula, not a page

Recipe sites treat every cookie as a separate document. That makes them impossible to compare. We treat each one as a set of ratios, which makes them directly comparable — and makes it possible to ask what actually causes chew.

Step one: put every recipe in the same units

Recipes are written in cups, sticks, dozens and pinches. We resolve every ingredient line to grams — preferring the author's own gram weights where they publish them — then express everything as a percentage of the flour weight. That is the baker's percentage, and it is what lets a recipe making 48 cookies be compared directly with one making 12.

99.4% of quantified ingredient lines resolve to grams across all thirty recipes and twenty-five sites. The two that don't are "1 bag of chips" and "1 standard ice cube".

Step two: find what actually moves the outcome

Reviews are the hidden asset. When someone writes "I used 1½ cups brown sugar instead of ½ and they came out chewier", that is a controlled experiment someone else ran for free. We read 10,058 reviews of this dish and kept every one that names a change and the result it produced — that is what lets us measure which ratios move which outcomes.

Only levers whose 95% confidence interval excludes zero appear below. Each bar is the interval; the tick is the estimate.

Step three: keep the disagreements

We pulled 80 distinct pieces of advice out of the reviews. 33 of them contradict another one — and that is the most useful part. Opposing advice almost always means the two cooks wanted different cookies.

What we can and cannot claim

This matters more than any feature. We tested the engine two ways.

Question	Result	Verdict
Which of these two is chewier?	92% correct, 51 pairs	Reliable
Which has a crisper edge?	74% correct, 97 pairs	Reliable
What will this score on chew?	worse than guessing	Not usable

So this site ranks; it never scores. You will never see "7.2 out of 10 for chew" here, because that number would not be trustworthy. Every comparison is relative, and relative is what the evidence supports.

Honest gaps

No egg-free, dairy-free or gluten-free options. All thirty recipes contain all three. Those filters correctly return nothing.
Calories cover 21 of 30. Nine sites publish no nutrition data.
Reviews skew positive. Only the 7–20 reviews embedded in each page are readable, and they lean five-star — so anything derived from failure rates is optimistic.
Costs are estimates, running about 14% below the one site that publishes real per-ingredient prices.