Quick answer: The best wood for an Ooni pizza oven is kiln-dried oak under 15% moisture, sized 5 to 6 inches long and 2 to 3 inches thick. Oak holds the longest coal bed and reaches 850 to 950 degrees Fahrenheit, the temperature range Ooni Karu and Karu 2 Pro need for a proper Neapolitan bake. Cherry is the second-best choice if you want a light fruity aroma. Ash is the fastest to ignite. Avoid pine, cedar, charcoal, and any wood above 20% moisture.
If you own an Ooni Karu 12, Karu 16, Karu 2 Pro, or Fyra, you already know the dome can hit 950 degrees Fahrenheit in 20 minutes when fed the right wood. With the wrong wood, the same oven smokes, fights to stay above 700, and leaves a bitter taste on the dough. Here is what works and why.
What Ooni's own guide says
Ooni recommends kiln-dried hardwood under 20% moisture content, with pieces around 5 inches long and 2 to 3 inches thick. Oak is the brand's flagship recommendation and Ooni sells their own "Premium Hardwood Oak Logs" cut for Karu 16 and Karu 2 Pro chambers.
Firewood Flex meets the Ooni spec with our 1.33 cu ft Box at $39.60, which contains compact split pieces sized for standard pizza oven chambers. Our moisture target is under 15%, tighter than the 20% Ooni recommends, which means faster ignition and cleaner flame.
Best wood species for Ooni, ranked
1. Oak (recommended for daily Neapolitan use)
Oak is the workhorse for Ooni pizza ovens. Red oak produces 24.0 million BTU per cord, white oak 24.6 million. Both species push dome temperatures to 850 to 950 Fahrenheit in roughly 45 minutes of preheating and hold there through a full pizza session. Oak coals last 60 to 75 minutes on average, the longest of any common hardwood, which is why most Neapolitan pizzerias default to it. Smoke is moderate but clean if moisture stays under 15%. This is the species we recommend if you make pizzas more than once a month.
2. Cherry (recommended for aroma)
Cherry hits 19.5 million BTU per cord. Lower heat output than oak but it lights faster and burns with a light, fruity smoke that adds a subtle aroma to the crust without overwhelming the dough. Cherry coals last about 45 minutes per load, typically enough for 6 to 8 pies before a reload. A common stack is oak for the base heat and a few cherry pieces near the end for visible flame and aroma.
3. Ash (recommended for fastest startup)
Ash sits at 23.6 million BTU per cord. It lights faster than oak, reaches 800 to 900 Fahrenheit in roughly 30 minutes, and burns with very low smoke. Coals last 50 to 55 minutes on average. Ash is the choice if you want to fire up the Ooni quickly on a weeknight and bake 3 to 4 pizzas before the family disperses.
4. Maple (acceptable but slower)
Sugar maple delivers 24.0 million BTU per cord, similar to oak by heat output, but it burns slightly cooler and produces a coal bed that fades faster. Maple is fine for occasional use and adds a barely-detectable sweet aroma. Not the first pick for back-to-back Neapolitan service but works well for one-off home pizza nights.
5. Hickory (use sparingly)
Hickory burns as hot as oak (around 24 million BTU per cord) and produces excellent coals, but the smoke is strong. Used alone, hickory can overpower a Margherita and leave the dough tasting like a BBQ smoker. The solution most serious pizza makers land on is a 70/30 blend of oak to hickory, which gives the long coal bed of oak with a hint of hickory character.
What Ooni model do you have?
Ooni's various models have different chamber sizes and different wood requirements. The numbers below are typical averages from home pizza-oven tests; your actual results depend on outdoor temperature, ambient wind, and how full you keep the firebox.
| Ooni model | Max wood piece size | Preheat time (oak) | Wood per session (8 pizzas) |
|---|---|---|---|
| Karu 12 | ~5 inches long, 2 inches thick | 20 to 25 minutes | 4 to 6 pieces |
| Karu 16 | ~6 inches long, 3 inches thick | 25 to 30 minutes | 6 to 8 pieces |
| Karu 2 Pro | ~6 inches long, 3 inches thick | 25 to 35 minutes | 6 to 10 pieces |
| Fyra (pellet only) | Pellets, not logs | 15 to 20 minutes | Not applicable |
Numbers are averages. Your actual preheat and wood consumption will vary by outdoor temperature, wind, how often you open the door, and how hot you push the oven.
Wood NOT to use in your Ooni
- Softwoods (pine, spruce, fir, cedar): too much smoke, sap, and creosote. Coats the dome and ruins the next pizza.
- Treated or painted wood: releases toxic chemicals onto your food. Never use construction scrap.
- Wet or seasoned-only firewood above 20% moisture: wastes heat boiling off water, fills the dome with steam, prevents proper coal bed formation.
- Plywood, particle board, MDF: contains glue and formaldehyde.
- Charcoal briquettes: designed for grills, not pizza ovens. Briquettes do not produce the open flame that Neapolitan dough needs for the leopard-spot char.
- Lump charcoal: works in a pinch for Ooni Karu's optional charcoal mode but does not replicate true wood-fired flavor.
How much wood for one Ooni session?
A typical home pizza session with an Ooni Karu 16 producing 8 to 10 pizzas uses roughly 6 to 10 pieces of kiln-dried hardwood, or about one third to one half of a Firewood Flex Mega Bag. Cherry sessions go through wood slightly faster than oak because the coals fade sooner.
If you make pizzas weekly through summer, the math works out to about 4 to 5 Mega Bags or 1 Box per month on average. The 1.33 cu ft Box at $39.60 is sized for casual pizza nights. The 15 Mega Bag Bundle at $449.90 stocks a household for a full pizza-and-fire-pit season.
Where Firewood Flex fits
Our 1.33 cu ft Box ($39.60) contains compact split pieces sized for Ooni Karu 12, Karu 16, Karu 2 Pro, Gozney Roccbox, and Solo Stove Pi without resplitting. The 1.75 cu ft Mega Bag ($49.50) also works for Karu 16 and larger ovens. All pieces are mixed kiln-dried hardwood (oak, walnut, birch, hickory, cherry, maple) heat-treated to a 160 degrees Fahrenheit core for 75 minutes, with moisture held under 15%.
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FAQ
What is the best wood for Ooni Karu 16?
Kiln-dried oak under 15% moisture, sized 5 to 6 inches long and 2 to 3 inches thick. Oak holds the longest coal bed and reaches the 850 to 950 degree dome temperatures Karu 16 needs for Neapolitan bakes. Cherry is second best if you want a fruity aroma. Ash lights fastest. Avoid softwoods, treated wood, and wet wood.
Can I use the same wood for Ooni Karu 2 Pro and Karu 16?
Yes. The chamber sizes are similar and both accept pieces up to about 6 inches long and 3 inches thick. Firewood Flex Box pieces and Mega Bag pieces fit both models without resplitting.
Does Firewood Flex sell pellets for Ooni Fyra?
No. Firewood Flex only sells split log firewood. Ooni Fyra requires hardwood pellets which are a different product category.
How much does wood for Ooni cost per pizza session?
On average, a home pizza session producing 8 to 10 pizzas uses 6 to 10 pieces of kiln-dried hardwood. From a Firewood Flex Box ($39.60), that works out to roughly 3 to 4 sessions per box, or about $10 to $13 per session. Your actual usage will vary by oven size and how long you keep the oven hot.
Is kiln-dried oak better than seasoned oak for Ooni?
Yes. Kiln-dried oak at 14% moisture produces roughly 7,000 BTU per pound, while seasoned oak at 22% moisture produces about 5,400 BTU per pound and loses an additional ~26% of heat to evaporating internal water. The practical result is faster preheats, hotter domes, and less smoke. See our kiln-dried vs seasoned firewood comparison.
What is the moisture content target for Ooni pizza oven wood?
Ooni recommends under 20% moisture. Firewood Flex holds moisture under 15%, which is tighter than the Ooni spec. Lower moisture means faster ignition, hotter dome, less smoke, and cleaner flavor on the dough.
Can I mix oak and cherry in one Ooni session?
Yes. A common stack is oak for the base heat and coal bed, with a few cherry pieces added near the end for flame visibility and a subtle fruity aroma. Avoid mixing in softwood or unknown species; stick to USDA-certified kiln-dried hardwood so you know what you are burning.
Related reading
- Full pizza oven wood guide (cherry, oak, ash compared)
- Firewood BTU chart by species (25 species)
- Kiln-dried vs seasoned firewood (heat output comparison)
- How much firewood do I need? (cord, face cord, bag math)
Sources and references
- Ooni official site
- USDA APHIS Plant Pest and Disease Programs
- USDA Forest Products Laboratory
- US Forest Service for cord and species data
About the Firewood Flex Team
Written by the Firewood Flex operations team. We kiln-dry to USDA APHIS standard, log moisture content per batch, and ship from our Levittown, PA distribution facility with USDA APHIS phytosanitary-certified hardwood to 11 Northeast states. Founded 2025. USPTO Serial 99591611.
