By Bill Ohaire | Published: April 2026 | Last Updated: April 2026

Colourful grilled vegetables on the barbecue

Photo by Askar Abayev on Pexels

Quick Answer

Onion at 200°C (400°F): Cook for 15-20 minutes (thick rings) using direct heat. Target internal temperature: Softened with char marks.

Onion at 200°C (400°F) — Overview

Good searing temperature. Produces those classic BBQ onion rings with caramelised edges.

BBQ Temperature

200°C (400°F)

Cook Time

15-20 minutes (thick rings)

Internal Temp

Softened with char marks

Heat Method

direct

Cooking Times at 200°C (400°F)

DetailValue
BBQ Temperature200°C (400°F)
Cook Time15-20 minutes (thick rings)
Target Internal TempSoftened with char marks
Heat Setupdirect

Why Cook Onion at 200°C?

Good searing temperature. Produces those classic BBQ onion rings with caramelised edges.

Pro tip: Thick 1.5cm rings hold together better on the grill. Brush with oil on both sides.

Step-by-Step: Onion at 200°C

  1. Preheat: Get your BBQ to a stable 200°C (400°F). Use a grill thermometer at grate level for accuracy.
  2. Prep: Bring the onion to room temperature (15-20 minutes). Pat dry and season generously.
  3. Set up: Configure your BBQ for direct heat. Ensure even heat distribution across the cooking surface.
  4. Cook: Place the onion on the grate and cook for 15-20 minutes (thick rings). Flip halfway through.
  5. Check: Use a digital meat thermometer. Target: Softened with char marks.
  6. Rest: Remove from heat and rest before cutting or serving.

Common Mistakes at 200°C

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Frequently Asked Questions

How long to cook onion at 200°C?

Cook onion at 200°C (400°F) for 15-20 minutes (thick rings). Use direct heat and check the internal temperature reaches Softened with char marks.

Is 200°C a good temperature for onion?

Good searing temperature. Produces those classic BBQ onion rings with caramelised edges.

What internal temperature should onion reach?

Target Softened with char marks. Always use a digital meat thermometer inserted into the thickest part for accuracy.

Should I use direct or indirect heat at 200°C?

At 200°C, use direct heat for onion. Direct heat gives you better sear marks and caramelisation.

Related BBQ Guides

Sources & References

1
Serious Eats
The science of caramelisation — getting the best char on grilled vegetables.
Reference
2
Mad Scientist BBQ (YouTube)
Smoked vegetable experiments and creative BBQ sides.
Video
3
Weber Grill Skills
Weber Australia's vegetable grilling tips and recipes.
Manufacturer
4
Food Standards Australia New Zealand
Australian dietary guidelines and food safety for grilled produce.
Government