Cater to your tastebuds and discover the ultimate mushroom onion recipe with these perfectly roasted onions and mushrooms. This easy-to-make dish boasts a harmonious blend of caramelized onions and tender mushrooms in a rich garlic butter sauce, delivering an irresistible taste that perfectly enhances steak, pasta, chicken, and more! Best of all, you’ll need just 5 minutes of hands on prep to make them.

“Made this recipe with Portobello mushrooms, did not have enough pearl onions so substituted sliced shallots. The best baked mushrooms ever. I appreciated all the mushroom pro tips and the nutrition information.”
– Mary Anne

Update: This recipe was originally published in December 2014. I made updates to the post below to include more information about roasting mushrooms and onions.
About this recipe for mushrooms and onions

Discover a culinary gem with this mushroom onion recipe, featuring roasted onions and mushrooms that deliver a burst of flavor in every bite. This dish is a celebration of rich, earthy mushrooms paired with sweet, caramelized onions, all perfectly roasted to achieve a delightful texture. Tossed with a rich, luscious garlic butter sauce infused with white wine, this is a savory, umami-packed side dish that’s as indulgent as it is satisfying. Whether you’re serving it alongside steaks, a hearty main course, or enjoying it on its own, this mushroom with onion recipe...