Heat about 2 teaspoons of oil in large frying pan (I use one that is 10-inch / 25-cm) on medium-high heat. When the pan is hot, swirl the oil around so it coats the pan.
Quickly ladle on the batter in the shape of a ring, then immediately use a spatula to spread the batter to fill the ring, and to spread the batter outward to make the pancake into a circle (I use about 3/4 cup of batter for each pancake on a 10-inch pan). The batter will cook quickly on the hot pan, so just spread it around as much as you can.
Cook the pancake for about 4 minutes, periodically lifting the pancake up to check if the bottom has browned. When the scallion pancake has browned on the bottom, lift the pancake up with a spatula, quickly add a bit more oil to the pan, and flip the pancake.
Cook for another 4-5 minutes until the bottom is browned. Remove from heat and set on a oil absorbing paper (or paper towel) to remove the excess oil. Repeat with the remaining batter. Using 2 frying pans simultaneously will speed up the cooking process.