In a large mixing bowl, combine corn starch, baking powder, and sweet corn. Add the sugar, soy sauce, fish sauce, minced cilantro, green onion, and egg. Mix thoroughly.
Add the ground turkey or pork to the mixture and blend well. Slowly pour in the ice-cold water while stirring until the mixture is combined but not overly wet.
Heat oil in a deep frying pan over medium-high heat. Using a spoon, scoop small portions of the corn mixture (about a spoonful) and gently pat them into shape. Wetting your hands can help prevent the mixture from sticking.
Carefully place the fritters into the hot oil. Fry in batches, turning occasionally until they are golden brown and cooked through. This typically takes 3-5 minutes.
Transfer the fritters to a colander or place them on paper towels to drain any excess oil.