Knowing that pumpkin is in there is one question. Knowing whether it's a real component or a wisp is another, and the label answers it more precisely than most people realize.
Under federal labeling rules, ingredients must be listed by common or usual name in descending order of predominance by weight. The list isn't a catalog. It's a ranking. Second place means there is more of that ingredient by weight than anything below it, and that makes position a genuine, free quantity signal on a package that is otherwise silent about amounts.
In our data, pumpkin generally shows up high. Across the 705 products where a position could be computed, the median position is fourth, and two thirds of the time pumpkin falls within the first five ingredients. In the audited 40, positions run from second to thirty-second, with ten of the seventeen inside the top five. Ahold's pumpkin spice finishing butter lists pumpkin second, behind only the butter itself. Toll House's latte morsels list pumpkin puree second of three inside the flavored chunks.
Two limits are worth keeping in view.
The first is the two percent rule. Ingredients present at 2% or less by weight are exempt from the ordering requirement when they're grouped at the end after a phrase like "Contains 2 percent or less of." Once a list reaches that block, position stops ranking anything — everything inside it is a small, unordered set. So a pumpkin listed at thirty-second of forty-seven, as it is on the Nutri-Grain bar, is telling you something quite different from a pumpkin listed third.
The second is that percentages are optional. If a manufacturer chooses to print one, it has to appear in parentheses after the ingredient as a percent by weight — but nothing requires them to print it, and almost nobody does. That's precisely why a figure like Starbucks's 2% comes from a company statement rather than off a package, and why ingredient position is usually the best signal available.
There's also a place pumpkin likes to hide. In four of our seventeen positive rows, it sits one level down inside a compound ingredient: Lucerne's eggnog carries pumpkin puree inside a "pumpkin spice egg nog base," Market District's caramel popcorn carries pumpkin powder inside a "pumpkin pie seasoning," 365 Everyday Value's latte bites carry it inside a "pumpkin spice latte seasoning," and the Toll House morsels tuck it into those flavored chunks. A quick scan of the top-level list alone would have marked all four as pumpkin-free.
One more quirk explains something you'll notice immediately on a real package. FDA's compliance policy on labeling of seasonings allows the collective term "spices" to stand in for the individual spice ingredients, while non-spice ingredients must be named. So a pumpkin spice product's ingredient list will often read simply "SPICES," naming neither the cinnamon nor the nutmeg. The ingredient list, ironically, tells you far more about the pumpkin than it does about the spice.