Insert a wooden skewer into each hot dog and wrap the cheese around it.
In a bowl, combine the flour, sugar, baking powder, and salt.
Add the egg and milk, and mix until a thick, smooth batter forms.
Pour the breadcrumbs into a deep bowl.
Pour the batter into a tall glass for easy dipping.
Dip the hot dog and cheese skewer into the batter, then roll it in panko breadcrumbs to coat evenly.
Heat vegetable oil in a deep pan to 350°F (180°C).
Fry the corn dogs in batches for 3-5 minutes, turning occasionally, until golden brown and crispy.
Place the fried corn dogs on paper towels to drain excess oil.
For a classic Korean twist, sprinkle with sugar.
Serve hot with ketchup, mustard, or your favorite dipping sauce.