Parmesan vs Parmigiano Reggiano — we tested them blind
Same supermarket. Almost Same price. The difference was immediate
Culinary Microscope · Toronto
What You Think You Know
Most people assume “Parmesan” and “Parmigiano-Reggiano” are the same thing — one just the English translation of the other. That assumption is wrong, and it’s costing you.
Inside the European Union, the word “Parmesan” is legally protected. It can only refer to Parmigiano-Reggiano — a cheese produced exclusively in five Italian provinces, aged a minimum of twelve months, made from exactly three ingredients: milk, calf rennet, and salt. No additives. No preservatives. No exceptions.
Outside the EU — in Canada, the United States, and most of the world — “Parmesan” is an unregulated term. Any manufacturer can use it. The cheese can be made anywhere, from any milk, aged for any duration, with any ingredients. The word means nothing.
The bag of pre-shredded Kraft Parmesan at your supermarket and a 24-month aged Parmigiano-Reggiano sitting one shelf away share a name. That is the only thing they share.
The Price
Irresistible makes a cheaper parmesan. I chose Kraft anyway — it’s the brand most people actually have in their fridge, and I wanted to give the category its best shot. The 24-month Parmigiano-Reggiano from Irresistible cost one Canadian dollar more than the Kraft Parmesan for the same 200 grams. One dollar. The only additional work required: shredding it yourself.
For shredding hard cheese, place a sheet of parchment paper flat on your counter before you start. Grate directly onto it. Hard cheeses like Parmigiano-Reggiano shred cleanly — far easier than something like mozzarella — and the parchment lets you funnel everything into the pan without losing a single shred.
That is the entire barrier to entry.
Here in Toronto, generic parmesan at the supermarket comes one way: pre-shredded. There is no block to grate yourself. This is what most people have access to, and it’s what we tested.
The Brands
Kraft Parmesan — Generic
Pre-shredded. Contains cellulose — an anticaking agent derived from wood pulp, added to keep the shreds from clumping. The same cellulose that coats each shred and interferes with melting.
Irresistible’s Parmigiano-Reggiano — 24 months aged
Ingredients: milk, salt, calf rennet. Nothing else. Both purchased at the same supermarket.
What Aging Actually Does
Parmigiano-Reggiano is aged a minimum of twelve months. The one we tested was aged twenty-four. Generic parmesan has no minimum — ten months is common, and the regulations stop there.
During aging, something happens that no shortcut can replicate. Proteins break down slowly into the compounds that build umami and those small white crystals you can see and feel when you bite in. Think of it the way you think of wine: time doesn’t just preserve, it transforms.
Generic parmesan skips this.
The Smell Test — Raw
We shredded both cheeses fresh and smelled them side by side, blind.
My mother identified the difference immediately. No hesitation.
The Parmigiano-Reggiano smelled nutty, umami, crystalline — like something concentrated by time. The Kraft Parmesan smelled like feet.
That is not editorializing. That was the note.
The Taste Test — Raw
We tasted the shreds.
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The Kraft Parmesan was dry and unpleasant. Not sharp, not complex — just dry and slightly off. Eating it on its own required effort.
The Parmigiano-Reggiano was different in kind, not just degree. Nutty. Dense with umami.
The Recipe
Chef Jean-Pierre’s fettuccine alfredo: pasta, heavy cream, Parmigiano-Reggiano. Nothing else. No garlic, no sun-dried tomatoes, no added complexity. The cheese has nowhere to hide and nothing to hide behind.
We added chicken for protein. Otherwise the recipe was followed exactly, in two identical batches differing only in the cheese.
What Happened in the Pan
As each sauce simmered, the difference became visible before it became edible.
The Parmigiano-Reggiano melted into the cream smoothly, the sauce thickening into a consistent, glossy consistency.
The Kraft Parmesan separated. The shreds and the cream split apart — the cheese clumping into small granules that resembled rice suspended in liquid. The culprit is the cellulose coating each shred: the same barrier that keeps pre-shredded cheese from clumping in the bag keeps it from bonding with fat in the pan. Two mechanisms compound this — generic parmesan is also frequently produced with acid rather than rennet, and acid-set cheeses melt poorly regardless of additives.
A note on fairness: once the pasta was added and everything was tossed together, the separation in the parmesan sauce was less dramatic than it appeared in the pot. It was smoother than what I heard from many Youtubers. We are reporting what we found, not what would make the better story.
The Smell Test — Cooked
We smelled both pots after the cheese had been incorporated.
My mother noticed the difference immediately. Again.
The Taste Test — Cooked
My mother tasted both bowls blind. She knew immediately which was which. She said she couldn’t believe how two cheeses with almost the same name and nearly the same price could taste so different.
The Parmigiano-Reggiano version: nutty, deep, with what I can only describe as an aged wine caramel complexity underneath the cream. Umami that lingered. A dish that felt complete.
The Kraft Parmesan version: cream with a mild cheese note, somewhere in the direction of mozzarella. Not unpleasant. Just one-dimensional. Flat.
And then I remembered something. Preppy Kitchen — one of the most-watched food channels on YouTube — recommends adding garlic to fettuccine alfredo because, he says, without it the dish tastes flat. He is right. But only about one version of it. But its also important to note that he used a Parmesan block that he shredded himself. As I said before this isn’t available in most supermarkets in Toronto but there may be a slight difference between shredded and block, worth testing.
The Parmigiano-Reggiano alfredo needed nothing. It was complete as designed. The garlic note, the added complexity, the boosters that YouTube recipes reach for — those are compensations. Compensations for using a cheese that cannot carry the dish on its own.
The recipe was built around Parmigiano-Reggiano. It has been for centuries. Somewhere along the way, a cheaper substitute took its place and the recipe quietly started requiring reinforcement.
We agreed on a difference of two points out of ten.
The Verdict
Parmigiano-Reggiano — Smell (raw): Nutty, umami, crystalline. Taste (raw): Complex, lingering. Cooked sauce: Smooth, glossy. Score gap: +2.0 rating of the dish: 8.5/10
Kraft Parmesan — Smell (raw): Feet. Taste (raw): Dry, unpleasant. Cooked sauce: Separated, rice-like. Rating of the dish: 6.5/10
For one dollar more and two minutes of grating, you get a dish that doesn’t need garlic to taste like something.
Buy the real one.
