- Preheat the oven to 200C. Line a 12-cup muffin pan with 1 ¼-inch paper liners. In a bowl, whisk the flour, baking powder, ½ cup Cheddar, Kefalotiri, 1 tbsp thyme, tarragon, chives and salt. In a large bowl, whisk the buttermilk, oil and eggs. Add the dry ingredients to the wet mixture and fold until just barely blended.
- Divide the batter among the liners (fill about three-quarters); top with ½ tbsp Kefalotori and pinch of chopped fresh thyme. Bake until puffed and golden brown and a toothpick inserted into the center comes out clean, 13 to 17 minutes. Cool in the pan.