Prepare a 9 x 13 inch pan by lining it with parchment or wax paper. This will keep the bars from sticking. Make sure to leave "handles" on the sides of the paper so that you can easily remove the bars from the pan when they're completely ready.

In a small saucepan, heat the orange juice, cranberries, and brown sugar over medium heat just until it starts to get steamy. Stir the cranberries to make sure they're all coated and also to allow the sugar to dissolve. Do not boil. You're re-hydrating the cranberries in this step and infusing the orange flavor from the juice. Remove the cranberries and juice from the heat and pour them into a bowl. Set aside to cool.

In the same saucepan, combine the honey, peanut butter, and butter. Heat them on low to melt. Stir often and do not boil. Remove from heat when all ingredients are completely heated and mixed together. Pour mixture into a large glass bowl.

To the peanut butter mixture add the vanilla, orange extract, cinnamon, flax seed, and cranberries (discard any juice that was not absorbed). Stir to combine.

Add the oats and walnuts and work together. This mixture will be very stiff. I use my hands when it gets too difficult to stir with a spoon.

Press the mixture evenly into your prepared pan. Refrigerate for about an hour. The mixture will stiffen during this time.

Remove from the pan and cut into 18 bars. Serve immediately. Store any remaining bars in an airtight container in the refrigerator.