Preheat the oven to 375 degrees. Spray an 8 x 8 or 9 x 9 pan with baking spray.
In a large bowl combine the butter, apple butter, vanilla, egg, and brown sugar and mix well. Set aside.
In another large bowl combine the Flahavan's Steel Cut Oatmeal, flour, baking powder, flax seeds, and cinnamon.
Pour half of the oatmeal mixture into the bowl with the apple butter and mix well. Add in the milk and stir well.
Pour the rest of the oatmeal mixture into the bowl with the milk mixture and mix well.
Fold in the apples. Pour in the prepared baking dish.
Bake for 25 minutes or until a toothpick inserted into the center comes out clean.
Allow to cool for 20 minutes and then cut into 12 bars.
Store in an air tight container for up to 1 week.