Preheat oven to 350F.

Line a baking sheet with parchment paper.

In a medium bowl, combine milk and apple cider vinegar and mix.

Let it sit 5-10 minutes until it thickens.

Meanwhile, if your oats aren't already ground, put them in a food processor and pulse for 10-15 seconds or until they are finely ground. Set aside.

In a large bowl, whisk together flour, salt, baking soda, and baking powder.

Cut in the butter using either a pastry cutter or two knives.

Stir in ground oats.

Pour buttermilk/milk and vinegar mixture into the flour.

Stir the dough until it is just combined but still sticky. Place down on a well flour surfaced.

Knead the dough 4 or 5 times.

Pat and shape into a 7 or 8 inch disk.

Place on the baking sheet.

Dust the top of the dough with flour.

With a large knife, cut an "X" 3/4 inch deep into the dough.

Bake for 50-60 minutes, until the bread is golden and a knife inserted in the middle comes out clean.

Allow to cool on a wire rack.