Whisk the first four ingredients together in a large bowl.
Add the butter to the flour mixture and mix with either your fingertips, a pastry blender, or two knives until it forms the texture of coarse meal.
Add the milk, chives, spinach and cheese and mix gently until just incorporated (the dough may look a bit dry, but allow it to sit for a few minutes and the flour will soak up all the milk).
Place dough on a lightly floured surface and gently press into an 8 x 8 inch square.
Cut the dough into 9 even squares.
Place scones on a parchment lined baking sheet and bake for 25 minutes or until golden brown. Move immediately to a wire cooling rack.