Preheat oven to 350 degrees
Spray a baking pan with nonstick spray
Add 3/4 cup old fashioned oats to a food processor or blender then process until oats have turned into flour.
Add milk, pumpkin puree, maple syrup, coconut oil, egg, and vanilla to a large bowl then whisk to combine.
Add remaining oats, oat flour, chia seeds, pumpkin pie spice, baking powder, baking soda, and salt then stir to combine.
Fold in chopped pecans then pour batter into prepared baking pan
Bake for 35-40 minutes, or until the edges are golden brown and the center has set
Cool before slicing into bars then store in the refrigerator