Add the almond flour, oat flour, cocoa powder, baking powder, and sea salt to a medium bowl and whisk until fully combined.
Next, in a separate bowl, whisk together the egg, coconut sugar, milk, coconut oil, and vanilla extract until it's nice and smooth.
Add your wet ingredient mixture to your bowl with the dry ingredients, and mix until they're fully combined. Then, fold in the chocolate chips
Once the mixture is fully combined, cover the bowl and place it in the freezer for 20 minutes, until it firms up.
While the mixture is freezing, preheat your oven to 350 F and line a baking sheet with parchment paper.
Once the mixture has finished freezing, it should form a dough. Place the dough directly onto the parchment-lined baking sheet.
Grease your hands lightly with oil (this will make it MUCH easier to work with the dough!) and then, press the dough into a, 11x3 or 4-inch rectangle. It should be approximately 1/2 inch thick.
Bake the dough for 20 minutes, until the edges are just slightly golden. Once done, remove them from the oven (being sure to keep the oven on) and allow them to cool for 10 minutes.
Once the dough is cool, use a sharp knife to carefully slice the dough, on a slight angle, into 1/2 inch thick biscotti slices. You should end up with 10-11 slices.
Then, turn each biscotti cut-side up and return them to the oven for 8 minutes. Once they're done, flip them over and bake them on the other side for an additional 8 minutes, until they're crisp and golden.
Remove them from the oven and let them cool for 5 minutes. The biscotti will continue to cook as they cool, so be careful not to over-bake!
Once 5 minutes are up, transfer them to a wire cooling rack and let them cool completely.
Finally, once the biscotti are cool, prepare the chocolate coating by adding the rest of your dark chocolate chips and coconut oil to a small bowl. Melt them together, in the microwave, in 2, 30-second increments. You can also do this on the stove, using the double-boiler method.
Once your chocolate is smooth, dip each biscotti halfway into the chocolate and return them to the parchment lined baking sheet.
Repeat these steps with the white chocolate chips, but instead of dipping, use a spoon to drizzle the white chocolate over the biscotti.
Return the biscotti to the refrigerator for 20 minutes. to allow the chocolate to set. Once done, serve and enjoy!