Preheat oven to 350 degrees F.

Whisk the flours, cocoa powder, espresso powder, baking powder, cinnamon and salt together in a large bowl.

Place the eggs, sugars and vanilla in the bowl of a stand mixer and beat with the paddle attachment until well incorporated. Add the dry ingredients and continue to mix until a stiff dough forms. Add the dark chocolate and almonds and mix until they are incorporated into the dough.

Divide the dough in half and place the balls of dough on a cutting board dusted lightly with flour or cocoa powder. Roll each ball out into a log roughly 9 inches long by 2 inches wide. Place them on a baking sheet lined with a nonstick silicone baking mat or parchment paper. Press down on the top of the logs to flatten them slightly.

Bake 26-30 minutes until firm to touch. As they cook, the logs will spread out slightly.

Remove from the oven and cool them on a wire rack for 10 minutes. Then transfer the logs to a cutting board and using a serrated knife, cut them on a diagonal into ½-inch slices. Arrange the slices upright on the baking sheet and place in the oven. Cook an additional 15-20 minutes (cook longer for extra crispy biscotti). Remove from the oven and cool on a wire rack before serving. For an extra chocolaty treat, dip the ends of the biscotti into melted chocolate and let harden before serving.