Best Grill Griddle Inserts: Turn Any Grill Into a Flat Top
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I’ve been cooking on griddle inserts for years — on gas grills, charcoal kettles, even over campfire grates. They’re the fastest way to get flat-top cooking without buying a dedicated griddle. But not all inserts are created equal. Some warp after a month. Others barely fit the grill they’re advertised for.
I tested several of the most popular grill griddle inserts across cast iron, stainless steel, and carbon steel options. This guide covers what actually works, what to watch out for, and which insert fits your grill and cooking style.
Quick Picks
| Product | Best For | Material | Price Range |
|---|---|---|---|
| Lodge Reversible Grill/Griddle | Budget pick, stovetop-to-grill versatility | Cast iron | $40–$60 |
| Little Griddle GQ230 | Full-size griddle surface on any gas grill | Stainless steel | $130–$160 |
| Steelmade USA Flat Top | Best heat retention, American made | Carbon steel | $80–$150 |
| Weber Griddle Insert | Exact fit for Weber Spirit/Genesis grills | Porcelain-enameled cast iron | $40–$55 |
What to Look for in a Grill Griddle Insert
Before picking an insert, think about how you’ll use it. Making smash burgers and breakfast for four is a different job than cooking pancakes for a tailgate crowd of twelve. Here are the things I check before committing:
- Material: Cast iron holds heat well but needs seasoning. Stainless steel heats fast but can have cold spots. Carbon steel splits the difference — great heat retention with easier maintenance than cast iron.
- Size: Measure your grill grates. A griddle that covers the entire grate blocks airflow and can choke your burners. You want some clearance on the sides.
- Thickness: Thin griddles warp. I look for at least 3/16″ steel or standard Lodge-weight cast iron. Anything thinner than that will bow under high heat.
- Sidewalls: If you’re doing stir-fry or anything with liquid, you need raised edges. Flat-only inserts limit what you can cook.
- Compatibility: Some inserts are designed for specific grill models. Others sit on top of any grate. Know what you need before buying.
1. Lodge Reversible Grill/Griddle — Best Budget Option
Lodge makes two versions of their reversible cast iron griddle: the Double Play (16.75″ x 9.5″, 9.35 lbs) and the larger Pro-Grid (20″ x 10.5″, 13.5 lbs). Both have a flat griddle side and a ridged grill side.
I’ve used the Double Play on a two-burner gas grill for over a year now. At 9.35 pounds, it’s heavy enough to stay put in wind but light enough that I can pull it off the grill with one hand using a good pair of heat-resistant gloves. The flat side is perfect for smash burgers and fried rice. The ridged side works for steaks and chicken if you want grill marks.
Heat distribution is solid — not perfect across the whole surface, but cast iron never is. The center gets hottest, which is actually ideal for searing. The edges stay about 50°F cooler, so I use those for keeping cooked food warm.
The Pro-Grid is the better choice if you have a three-burner or larger grill. At 20 inches, it covers enough real estate to cook for six to eight people comfortably. The extra thickness (0.81″ vs 0.62″) means better heat retention during wind.
Downsides: Cast iron needs regular seasoning or it rusts. The griddle surface isn’t perfectly flat — there’s a slight crown in the middle, which is normal for cast iron but means oil pools on the edges. And at nearly 14 pounds for the Pro-Grid, it’s not something you want to pack for camping unless you’re driving in.
Verdict: If you want a versatile, affordable griddle insert that works on basically any heat source, the Lodge Double Play is hard to beat for the price. The Pro-Grid is worth the extra $17 if you need more cooking area.
Check current price on Amazon →
2. Little Griddle GQ230 — Best Full-Size Stainless Option
The Little Griddle GQ230 is the griddle that makes your gas grill feel like a restaurant flat-top. It’s 25″ x 16″ x 6.5″ with built-in sidewalls, weighs about 16 pounds, and sits on top of your grill grates with removable handles for easy lifting.
What sets it apart is the cross-bracing underneath. Most stainless griddles warp over time — the GQ230’s welded bracing keeps it flat even after heavy use. I’ve had mine for about eight months and it still sits level on the grill. The 430 stainless steel construction heats evenly enough for pancakes, which is my acid test for any flat surface.
The sidewalls are a big deal. They’re about 2.5 inches tall on three sides, which means you can do proper stir-fry without food flying off. I use this for breakfast crowds — eggs, bacon, pancakes, hash browns all going at once. It’s the closest thing to a Blackstone griddle that fits inside a standard gas grill.
Downsides: Stainless steel doesn’t retain heat as well as cast iron or carbon steel. You’ll notice temperature drops when you load it up with cold food. Preheat longer than you think you need — I give it at least 10 minutes on medium-high. It’s also the priciest option on this list, running $130–$160 depending on where you buy.
Verdict: If you want a large, flat cooking surface and don’t want to buy a separate griddle unit, the GQ230 is the best stainless option I’ve used. The sidewalls and cross-bracing justify the premium.
Check current price on Amazon →
3. Steelmade USA Flat Top — Best Heat Retention
Steelmade makes flat top griddles out of thick carbon steel — 3/16″ for their standard line and a massive 3/8″ for the PRO series. They’re American-made, come preseasoned, and fit most gas grills that are 24″ or wider.
The standard flat top is what I’d recommend for most people. At 3/16″ thick, it holds heat noticeably better than stainless options. I did a side-by-side test with the Little Griddle on the same grill — the Steelmade surface recovered temperature about 30 seconds faster after loading it with burger patties. That matters when you’re cooking for a group and speed counts.
The 30-inch version (roughly 28.75″ x 16″) is sized for larger grills. They also make 20-inch and 22-inch versions for compact grills. Make sure you measure your grill grates before ordering — the fit needs to be right for proper airflow.
The PRO series at 3/8″ thickness is overkill for most home cooks, but if you live somewhere windy or you’re doing high-volume tailgating, the thermal mass is genuinely impressive. It barely drops temperature when you throw on cold food.
Downsides: Carbon steel requires seasoning, similar to cast iron. It will rust if you leave it wet. The preseasoning that comes from Steelmade is decent but not bulletproof — I added two more layers of seasoning before my first cook and it’s held up well since. Also, these are heavy. The 30-inch standard weighs around 20 pounds.
Verdict: Best heat retention of any grill griddle insert I’ve tested. American-made quality. If you’re willing to maintain it like cast iron, the Steelmade flat top delivers restaurant-level performance.
Check current price on Amazon →
4. Weber Griddle Insert — Best for Weber Grills
If you have a Weber Spirit (300 series) or Genesis (300 series) gas grill, Weber makes a porcelain-enameled cast iron griddle insert designed to replace one of your cooking grates. Model 7658 fits Spirit grills; Model 7566 fits Genesis.
The fit is exact — no wobbling, no gaps. It drops right into the grate slot and sits at the same height as your regular grates. This matters more than people realize. A lot of universal inserts sit on top of existing grates, which puts them higher and closer to the lid. Weber’s insert sits at grate level, so you get better heat dynamics.
The porcelain-enameled surface is the easiest to maintain of anything on this list. No seasoning required. I’ve cooked eggs, bacon, and pancakes on it without any sticking issues. Cleanup is a damp cloth or scraper while it’s still warm.
It replaces one grate section, so you still have grill grates on the other half of your grill. That means you can simultaneously grill burgers on grates and cook onions on the griddle — which is exactly how I use it most weekends.
Downsides: It only fits specific Weber models. If you have a different brand grill, this won’t work for you. The cooking surface is also smaller than the other options here — roughly half your grill’s surface area. And at around $40–$55, it’s competitively priced but limited in scope.
Verdict: If you own a compatible Weber, this is the easiest griddle upgrade available. Perfect fit, no maintenance hassle, and you keep half your grill grates functional.
Check current price on Amazon →
Universal Griddle Inserts: Worth It?
There are dozens of generic “universal” griddle inserts on Amazon — thin steel plates that claim to fit any grill. Most are 1/8″ steel or thinner. I’ve tried a couple and they warp within weeks. The thin metal doesn’t distribute heat well, and you end up with hot spots that burn food in one area while leaving another undercooked.
If budget is tight, the Lodge Double Play at $40–$45 is a better investment than a $25 generic flat top. At least cast iron won’t warp, and you get the reversible grill side as a bonus.
How to Use a Griddle Insert on Your Grill
Getting good results from a griddle insert is about managing heat:
- Preheat the griddle, not just the grill. Turn your burners to medium-high and let the griddle sit for 8–10 minutes. Cast iron and carbon steel need longer than stainless.
- Don’t cover the entire grate. Leave at least 2 inches of open grate space on each side for airflow. Blocking all airflow can cause uneven heating and flare-ups.
- Oil the griddle, not the food. A thin layer of high-smoke-point oil (avocado, grapeseed) on the hot surface prevents sticking better than oiling the food.
- Use a squeeze bottle. For smash burgers and stir-fry, a water squeeze bottle helps steam and deglaze. Restaurant cooks use them for a reason.
- Scrape while hot. After cooking, scrape the surface with a metal spatula while it’s still warm. For cast iron and carbon steel, apply a thin coat of oil after cleaning.
Which Griddle Insert Should You Buy?
It depends on your grill and how you cook:
- On a budget or want versatility: Lodge Double Play or Pro-Grid. Works on stovetop, grill, campfire. Cast iron lasts forever.
- Want maximum cooking area: Little Griddle GQ230. Full-size stainless with sidewalls. Best for cooking large batches.
- Best heat performance: Steelmade USA. Thick carbon steel holds heat better than anything else here.
- Have a Weber grill: Weber griddle insert. Perfect fit, no maintenance, half-grate design.
Any of these four will turn your grill into a capable flat top. The differences come down to material preference, size needs, and how much maintenance you’re willing to do.
I’d skip the generic thin-steel options. Spend the extra $20 on something that won’t warp in a month.
About Mike: Mike is an outdoor cooking enthusiast and founder of GriddleKing with over 15 years of grilling experience. An avid camper and tailgater, he tests grills and griddles in real backyard and field conditions and writes from hands-on experience. He’s passionate about helping home cooks get the most out of griddle cooking, from weeknight dinners to campsite breakfasts.
