Preheat oven to 400 F. Prepare a cookie sheet with parchment paper. Spray with non stick spray.
In a large bowl, combine flours, oats, sugar, baking powder and salt. Mix to combine.
Using a pastry blender, cut butter into flours until it resembles small peas.
Add herbs, eggs and 1/2 cup of the buttermilk. Mix until just combined. Add additional buttermilk as needed, until the dough comes together.
On a well floured board, place dough. Sprinkle top liberally with flour. Using the palm of your hand, flatten dough into a disc about 1/2" high.
Using cookie cutters dipped in flour, cut out scones and place on prepared cookie sheet. Repeat until all the dough has been used. Brush the tops with buttermilk.
Bake for 20 minutes, until golden