Preheat the oven to 350 degrees F.
Put brown sugar, white sugar, flour, cinnamon, baking powder, butter, and almonds in a large mixing bowl. With mixer on low speed, add beaten eggs and vanilla. Mix just until dough holds together.
Put dough on a floured surface. Cut in half. Roll each piece into a log. Place on parchment-lined cookie sheet. Flatten each log slightly with palm of the hand. Lightly brush the top of each log with egg wash.
Bake for 25 minutes or until firm to touch. Remove from oven. Cut dough diagonally into biscotti. For harder biscotti, return to 300 degree F oven until sufficiently dry.
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