You love the idea of a wood-fired pizza oven but worry about the hassle of managing a fire. Or maybe you want the option to switch to gas when you’re short on time. The Ooni Karu 12 multi-fuel pizza oven line solves both problems, letting you cook with wood, charcoal, or an optional gas burner. In this review, we compare the classic Karu 12 with the newer Karu 2, so you can decide which one deserves a spot on your patio. For more outdoor cooking inspiration, check out our outdoor cooking guides.
Buying Guide
Fuel Flexibility: Wood, Charcoal, or Gas
Both ovens are multi-fuel, meaning you can burn wood or charcoal right out of the box. The Karu 12 uses a custom fuel tray that maximizes airflow, while the Karu 2 features an extra-large tray for longer burns. If you want the convenience of gas, both accept an optional Ooni gas burner attachment, but the Karu 2 uses 36% less gas than previous models, making it more efficient for frequent use.
Consider how you plan to cook. If you enjoy the ritual of feeding a wood fire, either works. If you value quick weekday pizzas, the gas option becomes a deciding factor, and the Karu 2’s improved gas efficiency gives it an edge.
Heat Performance and Cooking Speed
Both ovens reach a scorching 950°F and cook 12-inch pizzas in about 60 seconds. The Karu 2 heats up in as little as 15 minutes, thanks to its advanced airflow management. The Karu 12 also reaches temperature in roughly 15 minutes, so there’s little difference in startup time. The real difference lies in heat retention: the Karu 2’s borosilicate glass door with ClearView technology lets you monitor the fire without losing heat, which is a game-changer for consistent bakes.
If you plan to cook multiple pizzas in a row, the Karu 2’s design helps maintain high temperatures longer, reducing the wait between pies.
Portability and Build Quality
The Karu 12 weighs just 26.4 pounds and features foldable legs, making it the ultimate travel companion for camping or tailgating. The Karu 2 is also portable, but its powder-coated body and integrated thermometer add a more premium feel. If you plan to move your oven between the garden and a caravan, the lighter Karu 12 is easier to handle. For a permanent backyard setup, the Karu 2’s sturdier construction and added features justify the extra weight.
Think about your storage space: the Karu 12 folds down compactly, while the Karu 2’s larger fuel tray and glass door require a bit more room. For more on portable cooking gear, see our kamado joe classic joe series II review for a different take on outdoor cooking.
Ease of Use and Cleaning
Both ovens are beginner-friendly, but the Karu 2’s integrated thermometer takes the guesswork out of temperature management. The Karu 12 relies on an optional thermometer or your own experience. Cleaning is straightforward on both: the Karu 12’s fuel tray minimizes ash residue, while the Karu 2’s advanced airflow reduces soot buildup. If you value convenience, the Karu 2’s glass door also lets you see when the pizza is perfectly charred without opening the oven.
For those who want to expand their outdoor cooking skills, the Karu 12 is compatible with Ooni’s cast iron cookware, so you can sear steak or roast vegetables. The Karu 2 offers similar versatility, making both ovens more than just pizza makers.
Final Thoughts
After comparing both ovens, we recommend the Ooni Karu 2 Multi-Fuel Outdoor Pizza Oven for home cooks who want the latest engineering, a built-in thermometer, and superior gas efficiency, while the Ooni Karu 12 Multi-fuel Outdoor Portable Pizza is the better pick for campers and budget-conscious buyers who prioritize portability and simplicity. Whichever you choose, you’ll be enjoying authentic Neapolitan-style pizza in under a minute.
Frequently Asked Questions
Can the Ooni Karu 12 use gas?
Yes, the Ooni Karu 12 can be used with an optional Ooni gas burner attachment, sold separately. This allows you to switch from wood or charcoal to propane for faster, more convenient cooking. The Karu 2 also supports gas, and its burner uses 36% less gas than previous models, making it more efficient in 2026.
How long does it take to heat up the Ooni Karu 12?
Both the Karu 12 and Karu 2 reach cooking temperature in about 15 minutes. They hit a maximum of 950°F, which is ideal for cooking a 12-inch pizza in 60 seconds. The Karu 2’s improved airflow helps it maintain that heat more consistently during multiple bakes.
What’s the difference between the Ooni Karu 12 and Karu 2?
The Karu 2 is the upgraded version with a borosilicate glass door, integrated thermometer, and a powder-coated body. It also has a larger fuel tray and more efficient gas burner. The Karu 12 is lighter, more portable, and slightly more affordable, making it a great entry-level choice. For a deeper dive into portable cooking, you might enjoy our FineMade 12-in-1 glass air fryer review for indoor alternatives.
Is the Ooni Karu 12 suitable for beginners?
Absolutely. Both ovens are designed for beginners and experienced pizzaiolos alike. The Karu 12 is simple to use, and the Karu 2 adds a thermometer for extra guidance. With a little practice, you’ll be turning out restaurant-quality pizzas in no time.
