onlyfire Outdoor Pizza Oven for Gas Grill Side Burner, Burner Top Pizza Oven Kit with Pizza Stone and Pizza Peel, 10.8'' x 12.4'' Review (2026)

Who this side burner oven fits

This onlyfire kit is built for a specific situation: a gas grill with a side burner that is currently used for little more than a sauce pan. Instead of buying a full standalone pizza oven, an owner sets this enclosed box over that burner and gets a dedicated small baking chamber without adding another appliance to the patio. It suits anyone who already grills regularly and wants to fold pizza night into the same cookout without hauling out a separate unit, and it is a reasonable entry point for someone curious about home pizza who does not want to commit to a large propane or wood-fired oven yet. Owners who host big groups and need several pizzas back to back, or whose grill lacks a side burner that matches the stated size, are not the target buyer here.

How the box, stone and peel work together

The kit measures 10.8 by 12.4 inches and is designed as an enclosed box that sits over the side burner, trapping heat the way a stone left on open grates cannot. According to the listing it can preheat to around 700 degrees Fahrenheit in about 15 minutes, with a double-wall ceiling meant to hold that heat steadily during the bake rather than losing it to open air. A cordierite pizza stone and a pizza peel ship with the kit, so a buyer can season the burner, drop in the stone and start baking without sourcing separate accessories first. Because the cooking chamber is sized for a single burner, the footprint stays small, which is exactly what makes it fit where a full-size oven would not.

Setting it up and using it on cookout nights

Setup is meant to be straightforward: place the box over a compatible side burner, let the stone preheat fully, then use the included peel to launch and retrieve pizzas. Because the chamber is compact, this is a tool for personal-sized pizzas rather than large family pies, so plan portions and toppings with that scale in mind rather than trying to stretch dough to fill a bigger surface than the box allows. Preheating the stone fully before the first pizza goes in matters more here than on a big oven, since a smaller chamber has less margin for a cool spot to even out during the bake. Cleaning is mostly limited to brushing off the stone and wiping the box exterior once it has cooled, similar to other grill-mounted accessories.

Where it fits against full pizza ovens

Next to dedicated propane ovens built from the ground up, like an Ooni Koda 16 or a Chicago Brick Oven kit, this side burner box is a smaller and more limited tool by design. Those standalone ovens reach higher output and larger cooking floors, letting them turn out bigger pizzas faster and handle a steady stream of orders for a crowd, while this kit stays tied to whatever burner output your grill's side burner already provides. The advantage runs the other way for anyone who does not want a second large appliance taking up patio space: this kit adds pizza capability to equipment already owned, at a fraction of the footprint and cost of a full oven. Fit is the deciding factor, since the box only works with side burners close to its stated dimensions.

Verdict and who should look elsewhere

Owners with a gas grill side burner sized to match this kit get a low-commitment way to add pizza nights to their regular cookouts, with a stone and peel included so there is nothing extra to buy before the first bake. It earns a solid score of 7.0 out of 10, reflecting a design that does its narrow job well without pretending to be a full-size oven. Anyone feeding a crowd, wanting larger pies, or lacking a side burner that fits the stated footprint should look at a standalone grill-top oven or a dedicated propane unit instead, since those options scale up cooking space and heat output in ways this compact box cannot match.

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