Preheat your oven to 350°F (175°C) to ensure even baking and a perfect golden color.
Line a baking sheet with parchment paper to prevent sticking and ease cleanup.
In a medium bowl, whisk together the all-purpose flour, baking powder, and salt for even distribution.
In a large mixing bowl, beat the room-temperature butter and sugar with a hand mixer until light and fluffy, about 2-3 minutes.
Add the eggs one at a time, mixing well after each addition. Stir in the vanilla and almond extracts.
Gradually add the dry ingredients to the wet mixture, stirring until just combined to avoid tough biscotti.
Fold in the sliced almonds evenly throughout the dough for added crunch.
Transfer the dough onto the prepared baking sheet and shape it into a log about 12 inches long and 3 inches wide, flattening slightly.
Bake the log for 25-30 minutes until lightly golden and firm. Remove and cool for 10 minutes.
Slice the log diagonally into 1-inch thick pieces. Place slices cut side down on the baking sheet and bake for another 10-15 minutes, flipping halfway, until crisp.
Cool biscotti on a wire rack. Store leftovers in an airtight container to maintain crunch.