Crunchy, twice-baked biscotti are an Italian-American cookie tradition perfect for dipping in coffee or espresso. These elegant, family-friendly cookies make a wonderful homemade gift.
Preheat your oven to 350°F (175°C) and line a large baking sheet with parchment paper.
In a large bowl, whisk together all-purpose flour, baking powder, and salt for even distribution.
In another bowl, beat the eggs and granulated sugar on medium speed for 2 minutes until pale and thick, then mix in melted butter and vanilla extract.
Gradually fold the dry ingredients into the wet mixture using a spatula; stir in sliced almonds to distribute evenly, but do not overmix.
Divide dough in half, shape into two 10-inch-long logs about 2 inches wide on the prepared baking sheet; flatten tops slightly with damp hands.
Bake for 25 minutes until lightly golden and firm; let logs cool on the pan for 10 minutes.
Lower oven temperature to 325°F (163°C). Using a serrated knife, slice each log diagonally into 3/4-inch pieces; place cut sides down back on the baking sheet.
Bake slices 10 minutes, flip, then bake 8 minutes more or until crisp and dry. Cool completely on a rack before storing.