01 - Preheat the oven to 350°F. Line a baking sheet with parchment paper.
02 - Whisk together all-purpose flour, baking powder, and salt in a medium bowl and set aside.
03 - In a large bowl, cream softened butter and granulated sugar using an electric mixer until the mixture is light and fluffy.
04 - Add ricotta cheese to the butter-sugar mixture and beat until smooth.
05 - Beat in eggs one at a time. Incorporate vanilla extract, lemon zest, and lemon juice until combined.
06 - Gradually add the dry ingredients to the wet mixture, mixing just until incorporated.
07 - Gently fold in unsweetened shredded coconut using a spatula.
08 - Divide dough in half. On the prepared baking sheet, form each portion into a log approximately 12 inches long and 2 inches wide. Flatten logs slightly.
09 - Bake in the preheated oven for 25 to 28 minutes, until golden. Remove from oven and allow to cool for 15 minutes.
10 - Lower oven temperature to 300°F. Using a serrated knife, cut each log diagonally into 3/4-inch-thick slices.
11 - Arrange slices cut side down on the baking sheet. Bake for 15 to 18 minutes, flipping halfway, until crisp and golden throughout.
12 - Cool biscotti completely before serving or storing in an airtight container.