Rinse the large shrimp under cold water and pat them dry thoroughly with a paper towel.

In a medium bowl, combine cornstarch, all-purpose flour, salt, black pepper, garlic powder, onion powder, and cayenne pepper.

Toss the shrimp in the dry mixture to ensure they are evenly coated.

Heat vegetable oil in a large skillet or wok over medium-high heat.

Fry the coated shrimp in batches for 2-3 minutes on each side until golden brown and crispy.

Transfer the fried shrimp to a paper towel-lined plate to absorb excess oil.

Serve the crispy shrimp on a platter, garnished with fresh cilantro and lemon wedges.