Preheat oven to 350F and place a sheet of parchment paper on a baking tray.
Combine flour, stevia, and baking powder.
Stir in eggs.
In a separate bowl, combine butter and vanilla extract.
Pour butter mixture in with flour mixture until smooth. Your dough will resemble cookie dough
Shape dough in rectangle shape (about 2cm high). It doesn't matter the shape, as long as the heigh is consistent so that it bakes evenly.
Bake for 25 minutes.
Let cool out of oven for 1hr.
Cut into 16 uniform slices. The easiest way is to cut the dough in half four times (see picture).
Place biscotti flat side down.
Preheat oven to 300F and bake for 15 min.
Flip biscotti and bake for another 15 min.
When you turn the oven off, leave biscotti in and allow them to cool in the oven (this will make them crispier) for about 30 min.
Heat white chocolate in the microwave for 90sec and dip biscotti however you like.
Cool the in the fridge to let the chocolate harden.