Pantry Staples
Cornflakes Cereal Conversion
Cornflakes Cereal weighs 28g per US cup.
| Amount | Grams | Ounces |
|---|---|---|
| 1 cup | 28.0 g | 0.99 oz |
| 1/2 cup | 14.0 g | 0.49 oz |
| 1/4 cup | 7.0 g | 0.25 oz |
| 1 tbsp | 1.8 g | 0.06 oz |
| 1 tsp | 0.6 g | 0.02 oz |
| 100 g | 100.0 g | 3.53 oz |
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Cornflakes cereal weighs just 28 grams per cup — extremely light for its volume, since the flakes are toasted and puffed corn, mostly air by structure, similar in principle to how popped popcorn achieves such a low density despite starting from a dense kernel.
Cornflakes were invented in the late 1800s by John Harvey Kellogg and his brother Will Keith Kellogg at a Michigan sanitarium, originally developed as part of a specific dietary and health regimen for patients rather than as a mass-market breakfast product — the now-famous Kellogg's brand grew directly out of that original health-focused invention.
Beyond eating them straight as cereal, crushed cornflakes are a common coating for baked "fried" chicken or fish, valued for the crunchy texture they add without deep-frying, and they're a traditional ingredient in a green bean casserole topping and various no-bake cookie or dessert bar recipes, where their light, crunchy structure adds texture without much added flavor of their own.
Their light, hollow structure means a little goes a long way when used as a coating, so a full box covers more servings than it might first appear.
A bag left open too long in a humid kitchen loses its crunch noticeably faster than one kept tightly sealed, since the flakes readily absorb ambient moisture given their thin, porous structure.
Cornflake-crusted chicken tenders are a popular home-cooking shortcut for achieving a crunchy, oven-baked coating without deep-frying, relying on the cereal already-crisp structure rather than building crunch from scratch with breadcrumbs.
Cornflakes' shelf-stable, low-moisture nature means an unopened box lasts many months in the pantry, though once opened, keeping the bag sealed tightly matters for maintaining their signature crunch, since they absorb ambient moisture readily given their thin, porous structure.
Beyond their use crushed as a coating or in a casserole topping, whole cornflakes are sometimes used as a simple ice cream topping or folded into a no-bake treat alongside melted chocolate or marshmallow for added crunch.
Frequently asked questions
Why do cornflakes weigh so little per cup?
They're toasted and puffed corn, structurally mostly air within a thin, crisp starch shell — a similar principle to why popped popcorn is so light, since both foods have been processed to expand a dense starting material into a much larger, airier volume.
Who invented cornflakes?
John Harvey Kellogg and his brother Will Keith Kellogg developed them in the late 1800s at a Michigan sanitarium as part of a specific dietary health regimen for patients, an origin that eventually grew into the modern Kellogg's cereal brand.
Can cornflakes be used for something other than cereal?
Yes — crushed cornflakes are a popular coating for baked "fried" chicken or fish (adding crunch without deep-frying), and they're used in casserole toppings and various no-bake dessert bar recipes for texture.
Does crushing cornflakes change the weight-per-cup figure?
Yes, significantly — crushed cornflakes pack much more densely into a cup than whole flakes, since crushing collapses much of the air-filled structure that makes whole cornflakes so light; a recipe specifying crushed cornflakes should be measured after crushing, not before.
Are all corn flake cereals nutritionally similar?
The base product (toasted corn flakes) is fairly similar across brands, though sugar content, fortification with vitamins, and added flavorings can vary meaningfully between products, so checking a specific brand's label matters for a precise nutritional comparison.