Preheat oven to 350°F (175°C). Line a baking sheet with parchment paper.
In a mixing bowl, whisk together flour, sugar, baking powder, and salt.
In another bowl, beat eggs and vanilla extract. Add to dry ingredients and mix to form a dough.
Fold in toasted almonds.
Divide dough in half and shape into two logs on the baking sheet. Flatten slightly.
Bake for 25-30 minutes until golden. Remove from oven and cool for 10 minutes.
Slice logs into ½-inch thick slices. Place slices cut side down on the baking sheet.
Bake for another 10-15 minutes until crisp. Cool completely.
Melt dark chocolate in a double boiler or microwave-safe bowl.
Dip one end of each biscotti into the melted chocolate. Place on parchment paper to set.