Preheat oven to 350℉. Lightly spray a 13" x 9" baking pan, then place parchment paper on top. TIP: Paper should be long enough to hang over the sides of the pan, so you can lift granola bars easily out, after baking! Spray the parchment paper on bottom/sides with non-stick spray. *If you have them, use "chip clips" to hold parchment paper in place while adding dough.

Cream butter, granulated and brown sugars in a large bowl, using electric mixer. Add egg, corn syrup (or honey), and vanilla. Beat well, until fully combined.

In separate bowl, combine flour, cinnamon, baking soda and salt. Add them (a little at a time) to butter/egg mixture, beating well after each addition. STIR chocolate chips, oats, and graham cracker crumbs into the dough, until combined.

Add dough to prepared pan. Spray/grease fingers lightly, then firmly press down on the dough. Keep packing dough down firmly until bottom of the pan and all corners are covered. *Remove "chip clips", if using.*

Bake at 350°F for 20-25 minutes. When done, edges should be crisp, and bars nicely browned on top. Transfer pan to a wire rack; let bars cool (in pan) for 10 minutes. Using parchment paper edges, carefully lift granola bars out of the pan. Place granola bars (still on the paper) on wire rack; cool to room temperature (they'll firm up more as they "cool").

Cut bars in half (top to bottom) using sharp knife OR pizza cutter. You should have 2 halves. Now slice the bars in half going the opposite direction (side to side). You should now have 4 sections. Slice each section in half (top to bottom). You should now have 8 rectangles. Slice all 8 pieces in half (top to bottom). You should have 16 granola bars. Serve and enjoy.

*Wrap each bar individually in plastic wrap to keep fresh and chewy. If freezing, place wrapped bars in airtight freezer bag or container.