Preheat oven to 350. Line a 9X13 pan with parchment paper.
In large bowl, cream together brown sugar and butter. Mix until creamy. Add in whole egg, two egg yokes, and vanilla. Mix until incorporated.
Combine orange zest, ginger, and orange juice. Slowly add in Bob's Redmill flour, salt, and baking powder.
Once well mixed, add chopped cranberries and white chocolate. Stir until combined.
Place dough in center of parchment lined pan, and taking a butter rubbed piece of parchment, place over dough and push until flat and even in pan.
Bake at 350 for 25 minutes, checking often. These won't raise much and that's good. We want a dense, heavy bar. Look for the edges to start browning slightly to gauge when done.
Let cool completly before frosting. If you place cream cheese frosting on a warm bar it will just melt and slide right off.