Granola

An American invention

Granola’s origin is traceable to specific inventors. Dr. James Caleb Jackson of New York created Granula in 1863 — baked graham flour broken into nuggets, one of the first cold breakfast cereals. Dr. John Harvey Kellogg (of the cereal family) created his own similar product and renamed it Granola in 1894 to avoid trademark conflict.

The baking chemistry

Rolled oats baked with oil and a liquid sweetener undergo two processes: the oats dehydrate and crisp; the sugars caramelise around them, binding the clusters. Egg whites, added by some commercial producers and home bakers, create larger clumps by binding the oats before they harden.

Clusters vs. granola

The difference between a granola full of large clusters and one that’s all loose oats is primarily technique: stirring during baking creates uniform small pieces; leaving it undisturbed for long periods allows larger clusters to form. Pressing the mixture flat before baking and not stirring at all produces granola bars or granola bark.

Commercial vs. homemade

Commercial granola typically contains significantly more sugar and oil than homemade — often 2–3x the sugar per serving. The “health food” reputation earned by homemade granola doesn’t necessarily transfer to most commercial products.