Place flour, butter, and baking powder in bowl and mix together either using your hands or a pastry cutter. Add Kerrygold Aged Cheddar Cheese, thyme leaves and mix. Add 150 ml of milk until the mixture forms a light dough. Do not overmix or scones will be dense and heavy.
Mix remaining tablespoon milk and egg yolk together and set aside.
Lightly flour surface and put dough on surface and roll out to ½ inch thickness. Cut dough with cookie cutter, tart mold or glass, and place on lined cookie sheet. Brush with milk/egg mixture and bake for 10-12 minutes until golden in color.
Recipe by Tout va bien! (tm) at https://christymajors.com/downton-sundays-the-carson/