In a large bowl, combine all-purpose flour, rice flour, salt, sugar, and yeast. Make sure the salt does not contact the yeast before mixing. Add water and milk.
Cover and let the dough sit and proof for at least 1 hour or until it doubles in size.
Punch down the dough and let it proof for about 20 to 30 minutes or until it doubles in size again.
During the second proof, begin prepping the cubed cheese, corn, and green onion.
Pour a good amount of oil in a non-stick skillet, enough to fry the hotteok on one side. This would be approximately 1/2 an inch. Heat the oil until it is nice and hot.
Pour a small amount of dough in the pan. Add the cheese, corn, and green onion. Salt and pepper to taste. Cover with another pour of dough.
Flip to fry both sides until golden brown
Enjoy!