Yes, a lot of brands make their mushrooms in frozen form. It is not just the easy way to remove stem pieces and dust but also an effective method of prolonging shelf life by keeping the plant more fresh longer.There is an article about can you freeze mushrooms, please watch it together. If you have any questions, remember to reply.
Some Are Better Frozen Than Dried
Leda Meredith is a food writer and certified botanist who has written five books on foraging and preserving food.
Freezing Raw Mushrooms
Clean the freshest mushrooms you can find. Avoid any mushrooms with dark spots, any that are shriveled and any that have an unpleasant odor.
Freezing Cooked Mushrooms
Grocery store button mushrooms, shiitakes, and wild mushrooms including oyster, chicken of the woods, and tooth mushrooms have a better texture when you finally use them if they are cooked before they are frozen.