Combine the warm milk and melted butter in a bowl. Sprinkle the yeast on top and let the granules dissolve for 1-2 minutes.
Mix the remaining dry ingredients in a large bowl.
Add the milk and yeast mixture and mix until a dough forms. Be careful not to overmix or the dough will get tough.
Knead the dough into a ball and cover to rise for 1-2 hours. Dough should almost double in size. TIP: leave to rise in a warm area.
Once your dough has risen (it should be about double the size), knead it again to remove any air bubbles.
Separate it into 8 equal pieces.
Roll each piece into a ball and flatten it to about 3-4 inches wide.
Place 1 tablespoon of filling in the center of each dough circle.
Fold the dough up and around the filling and make a ball. Be sure that all the filling is surrounding by the dough.
Heat 4 tablespoons of cooking oil over medium heat in a nonstick skillet.
Add the dough balls and brown for about 1 minute, until they start to turn light brown.
Use a nonstick spatula or this more traditional Korean style Hotteok press to flatten the pancakes as thin as you can get themwithout the filling coming out.
Let them cook another 1-2 minutes, until they are a medium golden brown.
Flip them over and cook another 30-60 seconds, until they are light golden brown.
Place the lid on and cook another 60-90 seconds, until medium golden brown. *The lid helps hold the heat in so the inside will become like a syrup.
Serve immediately while hot. Be careful as they will be HOT.
Video
Notes
Instant yeast should be used to allow the dough to rise quickly;
Dough should be placed in a warm (not hot) area to rise more quickly;
The dough should almost double in size after rising;
The dough should be just slightly sticky. Add additional flour if needed.
Lightly oil your hands when stuffing the dough - it will help prevent it from sticking;
Make sure all the edges are fully sealed before frying. Otherwise, the filling will ooze out.