Can you say golden brown and delicious? Crispy deep fried oyster mushrooms are one of the most addictive mushroom appetizers I've ever had. It's also a delicious vegan mushroom recipe. I learned the technique from my old boss Chef Lenny Russo when I was his sous chef at Heartland Restaurant in St. Paul MN.
The secret to the recipe is in the shape of the oyster mushrooms, as well as the technique. Oyster mushrooms have a wavy shape, and are mostly caps and gills. Those gills are the perfect shape for becoming extra crispy after being tossed with flour and deep fried.
I have two different versions of these I'll share with you. The first is the simplest, and includes only flour, salt, mushrooms and oil. The second involves brushing the mushrooms with mustard and herbs before dredging in flour. Both are delicious.
Notes on other variations
Some recipes might instruct you to coat mushrooms with panko bread crumbs or soak mushrooms in buttermilk or plant based milk. That can work, but it's definitely more work.
The only thing you need for crispy fried oyster mushrooms are mushrooms, flour, salt, and oil. I don't add any garlic or onion powder, but you can add a pinch of you want. A thermometer is helpful too.
Likewise, battered mushrooms are very different and will not come out crisp like these will, so I would avoid any recipe with a liquid batter as well.
Other ways to fry
Some of my friends have had good results making air fried oyster mushrooms. I don't own an air fryer, but it should work just fine if it's what you prefer.
The second way to make these is to bake them. I have another method for those too. If you want to bake them, see my baked oyster mushroom croutons.
Other mushrooms you can use
Oyster mushrooms are one of the best here, and you can use pink or blue oyster mushrooms, as well as just about any oyster mushroom variety. King oyster mushrooms are different and won't fry up the same as they don't have the same amount of gill surface.
Any of the mushrooms below will give you a great result. The best varieties will be hollow or thin, which helps them crisp without burning.
Version two: with mustard and herbs
The second version is inspired by mushroom Author Jack Czarnecki. In his book, he describes a method where the mushrooms are brushed with dijon mustard and dusted with breadcrumbs before deep frying.
It takes a little more time than simply tossing the mushrooms with flour, but it's well worth the effort it takes to prepare. The mustard version is very rich.
The recipes here are so simple I shouldn't need to list proportions, but you'll want to pay close attention to the method to get the same effect as the mushrooms pictured here.
How to Enjoy
Pure crunchy comfort food: these are one of the most delicious mushroom snacks I've had. They're great all by themselves with a cold beer, but at the restaurant we would use these in other creative ways. Here's a few examples.
- Served room temperature on a salad in place of croutons.
- As a garnish to a piece of baked or sauteed fish.
- Use a blend of mushrooms I've described in this post for a mushroom "fritto misto".
- I usually eat these all by themselves, but it's fine to serve them with a simple dipping sauce too. Creamy sauces are fine, as are lighter, tart Asian9style sauces made from things like soy sauce and seasoned with apple cider vinegar, lime or lemon juice.
Fried Oyster Mushrooms
Equipment
- Tall sauce pan, dutch oven or deep fryer
- Thermometer
- large mixing bowl
Ingredients
- 1 lb clean oyster mushrooms
- 2 cups All purpose flour
- Peanut oil, or your favorite frying oil as needed
- 2 teaspoons Kosher salt plus more to taste
Spices (optional)
- 1 teaspoon paprika
- 1 teaspoon garlic powder
- 1 teaspoon onion powder
- ½ teaspoon fresh ground black pepper
- ½ teaspoon cayenne pepper (optional)
Instructions
- Mix the flour and optional spices if using. Add the mushrooms to the flour and toss well to coat.
Frying
- Using a thermometer, heat the oil to 300 degrees in a stock pot or dutch oven note that you will need at least a couple inches of oil in the pan to make it work. Make sure the oil is at least 3 inches beneath the lip of the pan to prevent overflowing.
- Remove the mushrooms from the flour in small batches, tapping off the excess, then, working carefully, add them to the hot oil and cook for roughly five minutes (this will vary depending on species) or until you don't hear water sizzling in the oil (this means the water has been cooked off and the mushrooms will stay crisp and not be soggy.)
- When the mushrooms are thoroughly fried and golden, remove them from the oil to a bowl and toss with salt to taste. Remove the mushrooms to a cooling rack or paper towel on a tray in a warm oven. Repeat the process with the rest of the mushrooms.
- You can hold finished, fried mushrooms in a warm oven until all of the mushrooms are fried or place them on a cooling rack to help them stay crisp.
- Make sure that when you lay them out without touching after frying. Don't put them in a pile on top of each other as it will trap escaping moisture and make them less crisp.
Storing
- The mushrooms keep well for a day or two after they're cooked, unrefrigerated in a paper bag. Don't store them in a plastic container or they'll become soft. Reheat them in a 300 F oven for a few minutes to make them crisp again. At my house they rarely last more than an afternoon.
Mustard Version
- To make the version with mustard and herbs, take the oyster mushrooms and brush them lightly on the gill side with dijon mustard. Sprinkle with a mixture of herbs.
- I like a mixture of half Italian parsley mixed with thyme, tarragon, savory or oregano. Proceed with the recipe as directed above for frying the mushrooms, omitting the salt from the flour mixture.
- The mustard version contains more moisture, so it's more delicate. You'll need to watch them carefully so they don't scorch.
Michelle Kisliuk
I'm thinking of trying this in an air fryer, and just spritzing with oil. What do you think?
Alan Bergo
I think it would work as long as you spritz them with oil. If you try it let me know. I don't often use air fryers but I know they're popular.
Michelle R Kisliuk
So it's a year later. I think the floured kind last year did not come out that well for me (not crispy), but I didn't have much experience yet. The subsequent oysters I found or grew ended up in soups instead. But I just found some winter oysters in the neighborhood (after a very dry summer and fall in these parts). I rinsed (swished) and sprayed with avocado oil, then sprinkled salt and some hot pepper powder. It took several rounds for the moisture to come out in a combo of 10-minute rounds (4 rounds) on convection bake and then air fry, and they are delicious!
Alan Bergo
hey Michelle. Thanks for the notes on the air fryer times.
Mathew
We eat a lot wild oysters and really enjoy them, you are definitely correct about the bugs though.
If you want large quantities of the bug free one's you just need to pick them in the fall once the temperatures have dropped enough that the bugs aren't out anymore. They fruit prolifically at that time of year too.
By the way, I love your site and your recipes, I have made several and many of them are family favorites!
Alan Bergo
Glad it's worked out for you. Thanks.
Eleanor Brown
hoping to revive the comments here, is it possible to store these, I have lots of fresh yellowlegs to harvest, mostly I;m drying them but I'd love to try this recipe and store some croutons for later use.
Alan Bergo
You can store them for a few days at room temperature, max. You can also dehydrate them, then rehydrate, dry well, and proceed from there. Baking them is also an option.
Ashley Bird
Hi Alan,
I love this recipe. May I share this recipe on my facebook
Best regards
Ashley
Alan Bergo
Of course, just make sure to credit me.
Sam Schaperow
I don't have a deep fryer, but if I get a narrow pot, fill w/oil, and get it to 300 degrees (I'd use a thermometer to see), I should be fine, right?
A couple mushrooms that are thin fleshed caps to add to your list:
-The Blusher
-Megacollybia rodmani
Alan Bergo
Hi Sam. Yes, it would be totally fine to use a small pot and a thermometer, that's how I would do it without a deep fryer at home.
Dan F
I LIKE that idea!!
Alan Bergo
Yeah, takes a little work with the deep frying, but they're worth it.