Preheat your oven to 350°F. Line a cookie sheet with parchment paper.
In a separate bowl, whisk together flour, baking powder and salt. Set aside.
In a large mixing bowl, beat together the cookie butter and sugar until smooth.
Add eggs and vanilla to cookie butter and mix until well-combined.
Gradually add in the dry ingredients, mix until combined.
Shape your dough into two loaves that are each about 12 inches long, 2 inches wide and 1 inch tall. Place the loaves on your lined cookie sheet, leaving room for them each to expand.
Bake your loaves for about 25-30 minutes or until they are firm and a toothpick inserted comes out clean.
Remove from the oven for about 10 minutes.
Carefully, slice your loaves into 1-inch thick strips. Then, lay the biscotti cut-side down on the cookie sheet. Bake for about 10 more minutes and flip the biscotti so that the other side is facing down. Then, bake for another 5-10 minutes.
Allow biscotti to cool completely before adding cookie butter drizzle.