BBQA whole head of garlic can become a useful extra while the barbecue is already running: soft cloves to spread on bread or fold into a vegetable dish. Give it a sheltered roasting position and enough time to soften all the way through.
Choose the heat before the seasoning
Use a covered barbecue set up for indirect cooking. Weber's vegetable guide gives whole garlic a planning range of 40–50 minutes over indirect medium heat, 190–230°C (approximately 375–450°F). Treat that as a starting window, not a promise: bulb size and the behaviour of your barbecue affect the finish.
On a suitable gas grill, put the garlic above an unlit burner with another burner supplying the heat. On charcoal, keep it on the cooking grate away from the bank of coals. Follow your barbecue's instructions for its indirect setup. Do not put the packet directly among the coals.
Prepare a small, manageable batch
Start with two firm garlic heads, a little olive oil and salt if wanted. Rinse and dry the heads, remove loose outer paper, and leave the cloves attached. Cut across the pointed top to expose the cloves. Set each head cut-side up on foil, lightly oil the exposed surface and close the foil around it. Alternatively, use a covered, barbecue-safe roasting dish.
A small tray under the packets makes them easier to move together. Keep them clear of raw-meat drips and leave room to lift a packet out for checking.
Check a clove, not just the clock
Close the lid and roast indirectly. Start checking around 40 minutes. Move a packet onto a heatproof surface with tongs, then open it carefully away from your face: trapped steam can escape.
The cloves should be soft enough to mash, with a golden appearance. Probe an exposed clove with a small knife or skewer. If the centre still resists, close the packet and return it to the indirect area, checking again after a short interval. Darkening outside with firm cloves inside is a reason to check the heat and position, rather than moving it closer to the flame.
Let the garlic cool until safe to handle before squeezing the cloves from their skins. Discard any bitter, burnt portions.
Build the serving plan around the garlic
Toast bread near the end of the cook and offer the softened cloves separately so everyone can choose how much to spread. For a vegetable platter, mash a little garlic and add it at the table, tasting before adding more. Keep one portion plain if you plan to use it in another meal.
For a simple two-part menu, pair this guide with our grilled-bread guide in the reading links below. Start the garlic first; leave the quick bread step until the garlic is tender.
Store leftovers promptly
Food Hero advises refrigerating or freezing roasted-garlic leftovers within two hours. Freeze small, labelled portions if you do not have an immediate use for them.
Do not turn leftovers into a jar of garlic in oil for the kitchen counter. The National Center for Home Food Preservation warns that garlic-in-oil held at room temperature can support botulism. Its guidance is to refrigerate freshly made garlic-in-oil at 4°C/40°F or colder for no more than four days, or freeze it for longer storage. Roasting is not a shelf-stable preservation process.
About this guide
This is an original BBQ Stories editorial guide informed by the primary sources below. It has not been presented as a kitchen-tested recipe. The reading links also include our guides to grilling bread and handling BBQ leftovers.
Sources & further reading
- https://content-images.weber.com/downloads/Grill-Skill-vegetable-and-plant-based-bbq-guide.pdf
- https://foodhero.org/sites/foodhero-prod/files/monthly-magazines/Garlic%20ENG%20Monthly%2024.pdf
- https://nchfp.uga.edu/how/freeze/vegetables/freezing-garlic-in-oil/
- https://bbqstories.com/originals/how-to-grill-bread
- https://bbqstories.com/originals/bbq-leftovers-cooling-storage-reheating
Prepared with AI assistance.