In a large bowl, whisk together the flour, potato starch, sugar, salt, and black pepper.
In another bowl, combine the kimchi, 2 tablespoons of kimchi brine, scallions, and cold water.
Pour the wet ingredients into the dry ingredients and mix until combined.
Heat 1 tablespoon of oil in a skillet over medium-high heat. Add ⅔ cup of the batter to the center of the pan and use a spoon to spread it out in a flat circle.
Cook the first side for 3-4 minutes until golden brown and crisp. Flip the pancake and drizzle another tablespoon of oil around the pancake. Continue cooking for 2 minutes until crispy.
Transfer to a serving plate and cut into pieces. Enjoy!