Cut boneless, skinless chicken breasts into 1-inch cubes and marinate in soy sauce and garlic powder for 15 minutes.

In a large mixing bowl, whisk together flour, garlic powder, egg, milk, salt, and pepper until smooth.

Preheat frying oil in a skillet over medium heat to about 350°F. Test oil readiness with a small amount of batter.

Dip each chicken piece into the batter, fry in small batches for 3-4 minutes on each side until golden brown.

Drain excess grease on a wire rack or paper towels and drizzle with sweet chili sauce before serving.