Ninja FlexFlame, Grill and Smoker, Electric and Propane Gril

The Verdict

Let’s be direct: a grill that promises both electric convenience and propane power usually fails at one to make the other work. The Ninja FlexFlame doesn’t just split the difference — it actually delivers on both sides of that promise. After 210 Amazon ratings averaging 4.2 stars, the consensus is clear: this is the rare dual-fuel unit that earns its keep.

What’s Actually in the Box

Ninja packs a lot into the crate. You get the main grill body in stainless steel and black, a propane hose and regulator, a smoker box accessory, grill grate, and a meat probe for monitoring internal temps. The 318 square inches of cooking space handles a dozen burgers or a full brisket flat without crowding. Assembly is straightforward — most owners report 30–45 minutes with basic tools, and the instructions are clear enough that you won’t be left guessing.

The Dual-Fuel Reality Check

Here’s where the FlexFlame earns its name. Electric mode plugs into any standard outlet and heats up in about 8 minutes — perfect for weeknight chicken breasts or veggie skewers when you don’t want to fuss with propane. It holds temperature impressively steady, and the absence of flare-ups on electric mode makes it genuinely forgiving for beginners.

Switch to propane and you unlock the full 500°F+ ceiling. That’s where searing happens. Burgers get that caramelized crust, and you can actually smoke at 225°F for hours without babysitting the dial. The smoker box adds real wood smoke flavor — not just a hint, but actual depth that carries through pulled pork and ribs.

What Buyers Keep Praising

The temperature control gets consistent love. One verified reviewer noted, “I set it at 225 for a pork shoulder and walked away for 6 hours. Came back and it never wavered more than 5 degrees.” That kind of stability on a combination unit is rare at this price point.

Build quality also earns respect. The stainless steel body holds up to weather, and the porcelain-coated grates clean up without a fight. Multiple owners mention using it 3–4 times weekly for months without any performance drop-off.

Where It Falls Short

Nobody’s perfect, and the FlexFlame has real tradeoffs. At 68 pounds, moving it around is a workout. The wheels are functional but small — on gravel or uneven pavers, you’ll be lifting more than rolling. Plan a permanent spot if you’re not on smooth concrete.

Propane mode requires setup each time you switch from electric. The hose attaches in about a minute, but the regulator needs a proper connection to avoid low-pressure issues. Some buyers reported needing to re-seat the regulator on first use to get proper gas flow — an annoyance, not a dealbreaker.

The electric mode’s 425°F cap also means you won’t achieve the same Maillard reaction on thick steaks. Use gas for those; electric handles the everyday stuff.

Who Should Buy This

The FlexFlame suits three specific buyers: apartment dwellers with balcony outlets who want real grill flavor, weekend smokers who don’t want a separate dedicated smoker taking up patio space, and anyone who wants one appliance that covers both quick weeknight grilling and slow weekend smoke sessions.

Skip it if you’re a charcoal purist — nothing here replaces that smoky depth. Also skip if you need portability; this is a permanent-patrol unit.

FAQ

How long does it take to switch between electric and propane? About 5 minutes including the regulator connection and a 2-minute preheat check. Not instant, but manageable.

Can I use it indoors on electric mode? No. Ninja explicitly warns against indoor use. The smoker function produces smoke that requires outdoor ventilation.

Does the meat probe work in both modes? Yes, and it’s accurate within a few degrees. The probe wire routes through the lid without breaking the seal.

The Verdict

Buy it if you want one versatile machine that handles daily grilling and weekend smoking without a second appliance. The dual-fuel flexibility genuinely works, temperature control is excellent, and the build quality justifies the price.

Skip it if you need something lightweight and portable, or if charcoal is non-negotiable for your flavor profile.

Rating: 4.2/5 — The FlexFlame nails its core promise. Minor ergonomic gripes and a learning curve on propane setup keep it from perfection, but for most home cooks, this is the last grill you’ll need to buy.

Where to Buy

👉 Check Price on Amazon →

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.