Traeger Flatrock vs Blackstone Griddle: Which Flat Top Is Better?

Choose the Traeger Flatrock if

• You regularly cook foods that need very different heat at once, such as a hard sear next to eggs next to warming buns.
• Your patio is windy: a recessed top keeps flame and heat in better than a flat plate with guards.
• You hate guessing whether the tank will last; the Traeger Flatrock 3 Zone Griddle shows propane level on an LED gauge.
• You cook for 4 to 8 and 594 sq in is enough.

Choose the Blackstone if

• You feed 8 to 12 people and want the 768 sq in of the Blackstone 36 in. Original Griddle with Built-in Hood.
• You want to spend less, or put the savings toward a Blackstone Pro 22-Piece Griddle Tool Kit and a cover.
• You like a heat gradient across one open plate for sliding food from hot to warm.
• You want the broadest selection of third-party hoods, covers and parts.

On an open steel plate, heat travels sideways through the metal, so the edge of a high zone warms the low zone next to it. Blackstone owners use that deliberately: sear on the left, slide food right to hold. The drawback is that a truly low zone is hard to keep when the burner beside it is on high. Traeger's TruZone dividers limit that sideways spread and, according to Traeger, keep flavors from crossing between zones, which matters when fish shares the top with pancakes.

If you mostly cook one thing at a time for a crowd, dividers add little and cost you area. If you cook breakfast plates with three components, they are the main reason to pay for the Flatrock.

Neither listing publishes a BTU number, so there is no honest per-hour figure to quote from specs. You can measure it yourself: weigh the tank with a Flame King Digital Propane Tank Scale before and after a cook. Every pound burned is 21,548 BTU, about 83 cents of propane at $3.50 per gallon. For scale, the hoodless Blackstone 36 in. 4-Burner Griddle Cooking Station lists 60,000 BTU, which is about 2.8 lb per hour with every burner on high and about 7 hours on a 20 lb tank.

The Flatrock's LED level sensor tells you roughly how much is left without lifting the tank. On a Blackstone, a Flame King Smart Bluetooth Propane Tank Scale under the tank does the same job from your phone, and a spare Flame King YSN230 20 lb Propane Tank with Gauge ends the mid-cook scramble. Cost examples use propane at $3.50 per gallon (4.24 lb per gallon, about 83 cents per pound) and 21,548 BTU per pound; swap in your local price.

The Traeger Irontop 4-Burner Griddle ($599.99) is Traeger's other flat top. It has four burners under a 648 sq in top with a rust-resistant, heat-treated coating, 360 degree wind guards and a 3-year limited warranty on the listing. It gives up the TruZone dividers and propane sensor but adds 54 sq in and removes most of the rust worry that comes with bare steel. If rust on a seasoned top is what has kept you from buying a griddle, the Irontop answers that more directly than the Flatrock does.

Traeger is best known for pellet grills, which are a different tool. For pellet grills and smokers, see SmokerCalc.

Flatrock owners commonly praise even heat within each zone, the lid and the grease keg, and some mention that 594 sq in feels smaller than expected when cooking for a large group. Blackstone owners commonly praise the value and space and most often raise rust on tops that were not oiled and covered, plus grease cups that fill quickly on long cooks. Both complaints about rust come down to care, not the brand: scrape, oil and cover every time. Our Traeger Flatrock review and Blackstone 36 review go deeper on each.