01 - Preheat oven to 350°F. Line a baking sheet with parchment paper.
02 - In a medium bowl, whisk together all-purpose flour, baking powder, and salt. Set aside.
03 - In a large bowl, cream together softened butter and granulated sugar until light and fluffy.
04 - Beat in eggs one at a time, then mix in vanilla extract until fully combined.
05 - Gradually add dry ingredients to wet mixture, stirring until just combined.
06 - Gently fold in dried cranberries and white chocolate chips until evenly distributed.
07 - Divide dough in half. On prepared sheet, shape each half into a log approximately 12 inches long and 2 inches wide, flattening slightly.
08 - Bake logs for 25 to 28 minutes until lightly golden. Remove from oven and cool for 10 minutes.
09 - Lower oven temperature to 300°F.
10 - Using a serrated knife, slice logs diagonally into 1/2-inch thick pieces and arrange cut side down on baking sheet.
11 - Bake slices for 12 minutes, flip, then bake additional 10 to 12 minutes until dry and crisp.
12 - Allow biscotti to cool completely on a wire rack before serving or storage.