Costco Pizza Copycat: How to Nail the 18-Inch Pie at Home

Every copycat recipe on the internet promises you Costco’s food court pizza and then quietly hands you a 12-inch pie with eight ounces of shredded mozzarella on it. That is not a Costco pizza. That is a Tuesday.

The actual pie is 18 inches across, carries 24 ounces of cheese, and gets 10.5 ounces of sauce laid down in a spiral by a machine. Those numbers are the reason a $1.99 slice tastes the way it does, and they are also the reason your home version has always felt a little thin. You were not doing it wrong. You were doing it at the wrong scale.

So this is a copycat built backward from the spec sheet — the real cheese load per square inch, scaled honestly to a pan that fits in a 30-inch range. Fair warning: you are going to buy more cheese than feels reasonable.

1. The Spec Sheet You Are Actually Copying

Most food court pizza is a mystery. Costco’s is not, because the assembly line is public enough that the numbers have been documented in detail. Tasting Table’s breakdown of the assembly process lays out the whole sequence: a press flattens the dough across a pan for an 18-inch pie, an auto-saucer lays down 10.5 ounces of sauce in a tight spiral, and the cheese is weighed to an exact amount before it goes on.

That exact amount is the part nobody copies. A cheese pizza gets 24 ounces. A pepperoni pizza gets 14 ounces of cheese plus 60 slices of pepperoni arranged in a 4-3-2-1 triangle pattern. The whole thing is assembled in about three minutes.

Chowhound confirms the geometry — 18 inches in diameter, cut into 12 slices as standard, $9.95 for the whole pie and $1.99 a slice — and puts the cheese load at a pound and a half, which lines up with the 24-ounce figure exactly.

Here is what those numbers look like as a density, which is the only form that survives the trip to your kitchen.

Notice the pepperoni pie gets 10 fewer ounces of cheese. If you have ever thought the cheese slice at Costco tasted richer than the pepperoni one and assumed you were imagining it — you were not. It has 71% more cheese on it.

2. The Size Problem, and the Pan That Solves It

An 18-inch round will not fit in a standard American home oven. Most racks give you around 22 inches of width, and an 18-inch pizza needs all 18 of those plus room for your hands — and you would need an 18-inch stone, which mostly does not exist outside commercial supply.

So you scale, and the honest way to scale is by area rather than diameter, because circles are unkind to intuition.

The half-sheet wins, and it is not close. At 234 square inches it lands within 8% of a Costco pie, it fits any full-size oven, it costs about twelve dollars, and it gives you the rectangular cut that makes a pizza feel like a party instead of a dinner. If you have never baked on one, the sheet pan approach is genuinely beginner-friendly — no peel, no launch, no sliding disaster.

Look at the 12-inch row again, though. 10.5 ounces of cheese on a 12-inch pizza. Nearly every recipe on the internet tells you to use eight. That gap — about 30% — is the whole difference between “homemade pizza” and “tastes like the food court.”

3. Building the Cheese Blend

Costco does not use straight mozzarella, and neither should you. The food court blend is widely described as mozzarella with provolone and parmesan, and there is a good technical reason for each one.

Low-moisture mozzarella is the structural cheese. As cheese consultant Mark Todd puts it in PMQ’s guide to custom cheese blends, part-skim mozzarella “melts, flows and browns well, so it’s a good bulk cheese.” Todd’s standard starting point is 80% mozzarella, 10% cheddar and 10% of something loud.

Provolone is the loud one here. Pizza Today’s roundup of shop blends quotes Rico Lunardi of Slice on Broadway in Pittsburgh running a straight 50/50 mozzarella-provolone: the provolone adds “a little sharpness” that “balances out beautifully with the creaminess of the mozzarella,” and — this is the part that matters for a food court pie — the blend “performs really well when reheated, which is important for slices.”

Reheat performance is the tell. Costco pizza sits under a warmer and still tastes right, and a 50/50 blend is why.

My split for a half-sheet, hitting 22 ounces total:

• 14 oz low-moisture whole-milk mozzarella (64%) — the melt and the pull
• 6 oz provolone (27%) — sharpness, browning, reheat character
• 2 oz parmesan (9%) — salt and the savory back note

Buy all three as blocks and shred them yourself — bagged shreds carry an anti-caking starch that fights the melt, which is the case against pre-shredded cheese in one sentence. For brands, the mozzarella breakdown lives here and the wider cheese selection guide covers the rest.

One rule is not negotiable: use low-moisture, not fresh. Fresh mozzarella across 234 square inches will flood the pan.

4. The Dough: Cold, Slow, and Boring on Purpose

Costco’s own test kitchen publishes a pizza dough, and it tells you more about their philosophy than any copycat blog does. The Costco Connection cool-rise no-knead pizza uses a quarter teaspoon of instant yeast, a 12-to-18-hour refrigerator rise, and a 475°F oven. No kneading, no same-day panic, barely any yeast.

That is the right instinct and I am keeping it. A tiny amount of yeast over a long cold rise builds flavor that a two-hour dough simply cannot reach — the mechanics of which I broke down in the cold fermentation guide.

Where I depart from Costco’s version is hydration. Their no-knead dough runs very wet, which is fine for a 9-inch cast-iron pie and miserable when you are trying to push dough into the corners of a half-sheet. I drop it to about 64%, which stretches cleanly and still bakes open.

For a 234-square-inch pan you want roughly 772 grams of dough, or about 1 pound 11 ounces. That is a thicker-than-New-York, thinner-than-deep-dish crust — which is exactly where Costco sits. If you already have a dough you trust, the house dough recipe scales to the same weight without complaint.

5. The Sauce That Tastes Sweet Without Being Sweet

Costco’s sauce reads slightly sweet and very smooth, with no chunks and no herb speckle. It is a paste-forward sauce, not a crushed-tomato sauce, and it goes on uncooked.

Ten and a half ounces on an 18-inch pie is a heavier hand than most home recipes use, and it is deliberate: with 24 ounces of cheese sitting on top, a thin sauce layer disappears entirely. Scale it to 9.5 ounces — about 1 1/4 cups — for a half-sheet.

Build it from a can of tomato sauce plus concentrated paste for body. My tomato-paste sauce method is the closest match to the food court profile, and it takes about four minutes with a whisk. Skip the oregano-heavy blends — Costco’s is restrained, and a loud sauce fights the cheese.

6. Why More Cheese Needs More Time, Not More Heat

A 2025 study in Foods by Tarapata and colleagues measured moisture loss from cheese during baking across different cheese types, masses and temperatures. Two findings matter for a pizza carrying a pound and a half of cheese.

First, browning does not begin until roughly 30% of the cheese’s moisture has evaporated. That threshold held across every cheese they tested. Browning is not a temperature event — it is a dryness event.

Second, larger cheese masses lost moisture at a higher absolute rate but less than proportionally to their mass. Double the cheese and you do not double the drying speed. You get a thicker, wetter layer that takes noticeably longer to cross that 30% line.

Which means the instinct to crank the oven to 550°F and blast a heavily cheesed pizza is backward. You will scorch the crust bottom long before the cheese surface dries enough to brown. Hold at 475°F, per Costco’s own number, and give it the extra minutes.

Preheat matters more than peak temperature here. Give a stone or steel a full hour — the reasoning is in the preheating guide, and if you are still choosing a surface, stone versus steel is settled here. Set the rack low, use conventional bake rather than convection, and leave the door shut. Oven settings do real work on a pie this loaded.

7. The Full Recipe

8. Questions People Actually Ask