Kimchi Cheddar Biscuits

Name: Kimchi Cheddar Biscuits
Prep time: 50 min
Cook time: 15 min
Total time: 1 h 5 min
Cuisine: American
Ingredients: 210 grams (1¾ cups) all-purpose flour, plus more for dusting; 1 tablespoon baking powder; 1 teaspoon baking soda; 1 teaspoon granulated sugar; 1/2 teaspoon kosher salt; 113 grams (½ cup/1 stick) unsalted butter, cold, cut into ½-inch cubes; 50 grams (½ cup, packed) freshly grated sharp cheddar cheese; 60 grams (scant ⅓ cup) finely chopped ripe kimchi, liquid reserved; 150 grams (⅔ cup) buttermilk, cold, plus more as needed; 1 large egg