Your Cool Home is supported by its readers. Please assume all links are affiliate links. If you purchase something from one of our links, we make a small commission from Amazon. Thank you!
How long to grill sliced zucchini depends on the thickness of your slices and the heat of your grill, but most slices take about 4 to 6 minutes total.
If you’re wondering how long to grill sliced zucchini so it comes out tender with those perfect char marks, you’re in the right place.
Grilled sliced zucchini is one of the easiest summer sides you can make, and it pairs with almost anything off the grill.
In this post, we’ll break down exactly how long to grill sliced zucchini, plus the tips that make a big difference in texture and flavor.
Let’s fire up that grill.
How Long to Grill Sliced Zucchini
The answer to how long to grill sliced zucchini is simple: 2 to 3 minutes per side over medium-high heat.
That said, the exact time depends on a few things, so let’s look at each one.
1. Thickness of Your Slices
How long to grill sliced zucchini largely comes down to how thick you cut them.
Thin slices (about 1/4 inch) cook in as little as 2 minutes per side.
Thicker slices (1/2 inch or more) need closer to 3 to 4 minutes per side.
If you slice zucchini lengthwise into planks, expect 3 to 4 minutes per side too.
2. Grill Temperature
Medium-high heat, around 400 to 450°F, is the sweet spot for grilled sliced zucchini.
At this temperature, zucchini slices get nice char marks without turning to mush.
If your grill runs hotter, cut the time down and watch them closely.
Lower heat means longer grill time, and the zucchini may dry out before it browns.
3. Direct vs. Indirect Heat
For direct heat, how long to grill sliced zucchini is that quick 2 to 3 minutes per side.
Indirect heat takes longer, usually 6 to 8 minutes total, but it’s gentler and reduces flare-ups.
Most people grill sliced zucchini over direct heat for that smoky char.
Tips for Grilling Sliced Zucchini Perfectly
Knowing how long to grill sliced zucchini is half the battle, but a few prep tricks make a huge difference.
1. Slice Evenly
Cut your zucchini into uniform slices so they all finish cooking at the same time.
Uneven slices mean some pieces burn while others stay raw.
A mandoline or sharp knife makes this easy.
2. Pat Them Dry
Zucchini holds a lot of water, and moisture steams instead of sears.
Pat slices dry with a paper towel before grilling so they char instead of sog.
3. Brush With Oil, Not Drench
A light brush of olive oil keeps zucchini from sticking and helps seasonings cling.
Too much oil causes flare-ups that throw off your grill time.
4. Season Simply
Salt, pepper, garlic powder, and a squeeze of lemon after grilling is all you need.
Add herbs like basil or parsley once they’re off the heat so they don’t burn.
5. Don’t Walk Away
Zucchini grills fast, so stay by the grill while it cooks.
That short window for how long to grill sliced zucchini means a minute too long can turn them soft and lifeless.
How Long to Grill Sliced Zucchini at Different Thicknesses
Here’s a quick cheat sheet for how long to grill sliced zucchini based on how you cut it.
1. 1/4-Inch Rounds
About 2 minutes per side over medium-high heat.
2. 1/2-Inch Rounds
About 3 minutes per side, maybe 4 if your grill runs cooler.
3. Lengthwise Planks
About 3 to 4 minutes per side, depending on size.
4. Zucchini Spears
About 4 to 5 minutes per side since they’re thicker and take longer to cook through.
So, How Long to Grill Sliced Zucchini?
How long to grill sliced zucchini comes down to 2 to 3 minutes per side for most slices over medium-high heat.
Thicker cuts need a bit more time, while thin slices cook in a flash.
Keep the heat steady, pat your slices dry, and stay close to the grill so nothing overcooks.
With these tips, you’ll know exactly how long to grill sliced zucchini every single time.