01 - Preheat oven to 400°F. Line a baking sheet with parchment paper or lightly grease it.
02 - In a large mixing bowl, whisk together the flour, sugar, baking soda, and salt until well combined.
03 - Stir in the grated cheddar, chives, parsley, and thyme until evenly distributed throughout the flour mixture.
04 - In a separate bowl, whisk together the cold buttermilk, melted butter, and beaten egg until homogeneous.
05 - Pour the wet ingredients into the dry mixture. Using a wooden spoon or your hands, mix just until a shaggy dough forms. Do not overmix.
06 - Turn the dough onto a lightly floured surface. Gently knead 4 to 5 times to bring it together, then shape into a round loaf about 7 inches in diameter.
07 - Transfer to the prepared baking sheet. Using a sharp knife, cut a deep X across the top of the loaf.
08 - Bake for 35 to 40 minutes, or until the crust is deeply golden and a skewer inserted into the center comes out clean.
09 - Cool on a wire rack for at least 20 minutes before slicing to allow the crumb to set.