Turn Your Grill Into a Flat Top With These Inserts
For most grill owners, the Cuisinart 2-Piece Cast Iron Griddle Insert is the best choice because it fits most 3-burner gas grills, offers a large cooking surface, and retains heat evenly. Its main limitation is that cast iron requires seasoning and careful maintenance to prevent rust.
A griddle insert transforms your gas grill into a versatile flat top. You can cook pancakes, eggs, bacon, and vegetables without them falling through the grates. These inserts are perfect for breakfast outdoors or a quick stir fry.
We looked at top-rated inserts from Cuisinart, Grillaholics, and others. We considered fit, material, and how well they handle heat. Read on to find the best option for your grill.
How to pick the right one
What we recommend
Cuisinart 2-Piece Cast Iron Griddle Insert
This cast iron insert replaces two grill grates, giving you a 16 by 11 inch cooking surface. It fits most 3-burner gas grills, including popular brands like Weber and Char-Broil. Owners report excellent heat retention and even cooking. The raised lip prevents food from sliding off. It requires seasoning before first use and regular oiling to keep it nonstick.
Pros
- Excellent heat retention
- Large cooking area
- Versatile for various foods
Cons
- Heavy and can be awkward to handle
- Requires seasoning and maintenance
Grillaholics 2-Piece Cast Iron Griddle
Specifically designed to fit Weber Spirit and Genesis grills, this set replaces two grates. Each griddle measures 16 x 12 inches, giving you a combined 32 by 12 inch surface. Cast iron construction ensures even heat. The integrated grease trough channels drippings away. Owners appreciate the perfect fit for Weber grills.
Pros
- Precise fit for Weber grills
- Built-in grease management
- Durable cast iron
Cons
- Only fits Weber, not universal
- Heavy, may need two hands to place
Lodge Pro-Grade Cast Iron Reversible Grill/Griddle
Although technically a reversible griddle, it can be used as an insert on large grills with a wide cooking area. Measuring 20 x 9.5 inches, it offers a flat side and a ridged side. Its size is best for grills with at least 20 inches of width. Cast iron gives superb heat retention. It includes a grease spout at one end. This is a heavy-duty option for serious cooks.
Pros
- Very large cooking surface
- Reversible for two cooking styles
- Built-in grease spout
Cons
- May not fit standard 3-burner grills
- Extremely heavy (over 20 pounds)
Onlyfire Stainless Steel Flat Top Griddle
This stainless steel griddle insert is designed to replace grill grates on most 3-burner grills. It features a smooth surface with a grease trough and drain. Stainless steel resists rust and is easier to clean than cast iron. It heats up quickly and evenly. However, it may not hold heat as well as cast iron for searing. Owners like its low maintenance.
Pros
- Rust resistant
- Easy to clean
- Lightweight compared to cast iron
Cons
- Less heat retention
- May warp over high heat
Blackstone Universal Griddle Insert
This is a heavy-duty steel griddle plate that can be used as an insert on a grill or as a replacement for a Blackstone griddle top. It measures 22 x 20 inches, making it one of the largest inserts available. It fits Blackstone 36 inch models and many other large grills. The cold rolled steel is pre-seasoned and ready to cook. Its large size allows for cooking for a crowd.
Pros
- Huge cooking area
- Pre-seasoned surface
- Works with many large grills
Cons
- Too large for most standard grills
- Heavy and requires ample storage
KitchenAid Gourmet 2-Piece Nonstick Griddle
This nonstick aluminum griddle insert is perfect for cooking eggs and pancakes with minimal oil. It fits most 3-burner gas grills. The nonstick coating ensures food slides right off, and cleanup is quick. Aluminum heats up fast and evenly. However, it is not suitable for high-heat searing and may scratch if metal utensils are used. Owners appreciate the easy release.
Pros
- Nonstick surface for easy cooking
- Lightweight and easy to handle
- Quick heating
Cons
- Not for high heat searing
- Coating may wear over time
Craycort 2-Piece Cast Iron Grill Grate with Griddle
This set includes two cast iron plates: one flat griddle and one grill grate. They are designed to fit most 3-burner gas grills, allowing you to switch between flat top and grilling. Each piece measures 15 x 11 inches. The cast iron retains heat well. Owners like having the option to grill and griddle simultaneously. However, the set is pricey and heavy.
Pros
- Two cooking surfaces in one set
- Flexible for different recipes
- Even heat distribution
Cons
- Heavy pieces
- More expensive than single insert
How they compare
| # | Model | Material | Best for | Score | Price |
|---|---|---|---|---|---|
| 1 | Cuisinart 2-Piece Cast Iron Griddle Insert | Cast Iron | Most gas grills | 9.4 | Check price |
| 2 | Grillaholics 2-Piece Cast Iron Griddle | Cast Iron | Weber Spirit and Genesis grills | 9.1 | Check price |
| 3 | Lodge Pro-Grade Cast Iron Reversible Grill/Griddle | Cast Iron | Large grills and outdoor kitchens | 9.0 | Check price |
| 4 | Onlyfire Stainless Steel Flat Top Griddle | Stainless Steel | Easy cleanup and nonstick cooking | 8.8 | Check price |
| 5 | Blackstone Universal Griddle Insert | Cold Rolled Steel | Use with Blackstone griddles as an add-on | 8.5 | Check price |
| 6 | KitchenAid Gourmet 2-Piece Nonstick Griddle | Aluminum with nonstick coating | Low-fat cooking and easy eggs | 8.4 | Check price |
| 7 | Craycort 2-Piece Cast Iron Grill Grate with Griddle | Cast Iron | Multiple cooking surfaces in one insert | 8.2 | Check price |
Frequently asked questions
Can I use a griddle insert on any gas grill?
Most griddle inserts are universal, but you must measure your grill’s cooking area. Some are designed for specific brands like Weber or Blackstone. Check the dimensions and compatibility before buying.
Do griddle inserts work on charcoal grills?
Some inserts can be used on charcoal grills, but they are primarily designed for gas grills. Heat distribution may be uneven over charcoal. Look for inserts that fit your charcoal grill’s dimensions.
What is the best material for a griddle insert?
Cast iron is best for heat retention and searing. Stainless steel is easier to maintain. Aluminum is lightweight and heats fast but is less durable. Choose based on your cooking style and maintenance preference.
How do I season a cast iron griddle insert?
Wash and dry the insert. Apply a thin layer of vegetable oil all over. Place it on the grill and heat on high for about an hour. Let it cool and repeat if necessary. This creates a nonstick surface.
Can I cook eggs on a griddle insert?
Yes, eggs are easy to cook on a griddle insert. Use a nonstick or well-seasoned surface. Add butter or oil to prevent sticking. Cook on medium heat for best results.
Will a griddle insert fit my Weber Spirit grill?
Some inserts are specifically made for Weber Spirit. Check the product description for compatibility. The Grillaholics brand is known to fit Weber Spirit and Genesis models.
How do I clean a griddle insert?
For cast iron, scrape off food and rinse with hot water. Dry immediately and apply a thin oil layer. Stainless steel can be washed with soap and water. Aluminum nonstick should be hand washed gently.
Can I leave the griddle insert on the grill when not in use?
It is not recommended to leave it on the grill for extended periods, especially if the grill is outdoors. Moisture can cause rust on cast iron. Store it in a dry place after cleaning and oiling.
Are griddle inserts safe for high heat?
Cast iron can handle high heat. Stainless steel can too, but aluminum with nonstick coating should not be heated above medium. Always check the manufacturer’s guidelines.
What is the advantage of a griddle insert over a standalone griddle?
A griddle insert saves space and money, turning your existing grill into a flat top. It also allows you to grill and griddle simultaneously if you have multiple inserts.
The verdict
If you own a standard 3-burner gas grill and want a reliable griddle surface, choose the Cuisinart 2-Piece Cast Iron Griddle Insert. It offers excellent heat retention and a large cooking area for most breakfast and stir-fry needs. For Weber owners, the Grillaholics set provides a perfect fit. If you prioritize easy cleanup, the Onlyfire stainless steel insert is a solid alternative. Remember to season your cast iron and enjoy outdoor cooking all year.
