Preheat oven to 375º. Line an 8"x8" baking dish with parchment paper.
In a high speed blender or food processor, grind ½ cup rolled oats to flour. Empty into medium mixing bowl, and add all purpose flour, sea salt, and baking soda. Whisk to incorporate completely.
In a large mixing bowl, combine peanut butter, Thrive (or otheoil, brown sugar, egg, and vanilla. Mix by hand with a silicone spatula or with electric beaters until completely smooth.
Gradually add dry mix into wet, folding in with a spatula until just combined. Add chocolate chunks and mix completely. Press into lined baking dish in an even layer.
Bake 13-15 minutes, until the edges are beginning to brown and the top is light golden. Remove from oven and let cool for 5 minutes, then remove from pan and cool on a wire rack.