Melt coconut oil and/or butter. Let cool slightly.
Mix oats/flour, honey, oil, nut butter, eggs and cinnamon. The mixture should be quite moist. If it is not add more honey/oil. This is what binds the granola bars, so be sure all of the oats/flour are wet.
Stir in mix-ins.
Pour mixture into a greased or parchment lined 9x13-in. pan.
Bake at 350 for about 20 minutes, until the edges just start to become golden.
Let cool for about 20 minutes.
Cut into bars (they will still be quite soft at this point) in the pan (do not remove).
Allow to cool/solidify completely in the pan for 1-2 hours.
Remove bars from pan and wrap individually. Store in the refrigerator for up to a week or in the freezer for up to a year.
You can replace some or all of the quick oats with rolled oats, ground oats, wheat flour, rice flour, buckwheat flour.