
One of my favorite “grown in Hawaii” products at Costco is Hamakua Mushrooms. Sold in an 8 oz. container, the Pleurotus eryngii (a.k.a. King Trumpet Mushroom, King Oyster Mushroom, or Ali’i Oyster) is the largest of the oyster mushrooms. Not only are they beautiful (look at that picture above!), but they taste great when cooked and are quite popular among vegetarian and vegan recipes.
Read more to get information on their nutrition information and a suggested recipe to prepare this Hawaii grown product.
Hamakua Mushrooms is from the Big Island
Hamakua Mushrooms is a company based in Laupahoehoe on Hawaii island. They grow their mushrooms indoors in a 16,000 square foot facility. Visit their website for pictures of their facility and more information on their company.
Nutrition Information for Oyster Mushrooms
For nutrition information and breakdown of possible benefits of the oyster mushrooms, check out this post by healthline.com, 7 Impressive Benefits of Oyster Mushrooms.
Cooking King Oyster Mushrooms
These mushrooms have a “meaty” texture and hold up well when cooked in a pan. They can look a lot like scallops when the stems are cut into smaller pieces. Check out this recipe from Style Preservation for their King Oyster Mushroom Toast.

Notes for Hamakua Mushrooms at Costco in Hawaii
- Currently, an 8 oz container sells for $5.79 at Costco.
- I purchased this container of mushrooms from the Hawaii Kai Costco on O’ahu in January 2022.
- This product needs to be refrigerated and has an expiration date.
- If you’re interested in reading about other products from Costco, check out these posts, High Liner Flame Seared Orange and Black Garlic Cod or Vonbee Passion Fruit Honey Puree.
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