Wipe oyster mushrooms with a damp paper towel to remove any dirt.

In a large bowl, add the flour and all the spices. Mix together until well combined.

In a second bowl, add 1/3 cup of the flour mixture with 3/4 cups of water. Whisk together until to achieve a smooth batter consistency.

Dip each mushroom into the wet batter mixture and then into the flour mixture. Double coat each mushroom by returning to the wet batter and then back into the flour mixture, ensuring they are fully coated.

Heat oil in a pot over high heat and carefully drop mushrooms into the oil one at a time in batches. Fry for a few minutes until golden on all sides.

Remove mushrooms and place on paper towels to drain excess oil, then place on a cooling rack to keep crispy until the rest is done.