This grilled portobello mushrooms recipe is an easy 15-minute side dish! A simple balsamic marinade fills the mushrooms with delicious savory flavor.Jeanine Donofrio Phoebe MoorePublished Jun 16, 2026 Jump to recipe I make these grilled portobello mushrooms on repeat all summer.They’re such an easy side dish—meaty, savory, and ready in just 15 minutes on the grill.

Their edges are lightly crisp and nicely charred, while their insides stay perfectly juicy.A quick balsamic marinade fills them with rich, smoky, tangy flavor.Below, I’m sharing my tips and tricks for how to grill portobello mushrooms, my go-to seasoning, and my favorite ways to serve them.They’re the sort of ultra-flavorful, super simple side dish I think everyone should have in their back pocket in summer.

Try them for your next cookout or any time you’re firing up the grill! My Grilled Portobello Mushroom MarinadeThis recipe starts with a simple portobello mushroom marinade. It’s a combination of olive oil, balsamic vinegar, tamari or soy sauce, garlic powder, smoked paprika, and salt and pepper.If you’ve made some of my other mushroom recipes (see these roasted mushrooms or these mushroom burgers), you know that I love seasoning mushrooms with tamari and balsamic.The tamari brings out the umami notes of the mushrooms, while the balsamic adds a delicious sweet tang.Together, I think they make the mushrooms taste like the best versions of themselves—intensely savory and complex.I

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