In a large bowl add the olive oil and sugar. Combine well, using the electric mixer, until smooth. Scrape down the sides of the bowl occasionally to blend completely.
Add the flax mixture and anise extract and blend well.
Add the sifted flour mixture gradually, blending each time until just combined. NOTE: Toward the end, you will need to hand blend the remaining flour using your spatula, as the dough will be too heavy and thick for the electric mixer.NOTE: Do not blend for a long period of time, as this will make the cookies tough. Just enough to get all of the ingredients combined smooth. Cover and place the dough in the fridge for 1 hour.
Preheat the oven to 350°F, and place the oven rack on the 1st or 2nd lower shelf.
Once chilled, take the dough out of the fridge and shape into a medium size loaf, approximately 8-10 inches long.
Put the loaf onto the baking sheet/pan and place it in the oven.
Bake for approximately 40-45 minutes, until the loaf has turned a nice golden color.
Once the loaf has cooked, take out of the oven and let it cool to the touch.
Once the loaf is cool enough to handle, place it on a cutting board and slice the loaf into approximately 1/2" pieces (cookies).
Place the cookies back onto the baking sheet/pan, set the rack in your oven on the middle shelf, and let the cookies toast for 6-8 minutes on each side, until they are golden brown and cooked through completely.NOTE: This is an important step, and assures that the biscotti stays crunchy but dense on the inside. Once toasted, take the cookies out of the oven and place them on a cooling rack to cool completely.
ENJOY!