Preheat oven to 450°F.
Add the all-purpose flour, whole white wheat flour, baking powder, baking soda, and salt to WildSide jar and secure lid. Press "Pulse" 3-4 times to sift dry ingredients. Remove clear vented gripper lid insert, add butter, replace insert and press "Pulse" 8-10 times until resembles a coarse meal.
Add ½ cup buttermilk through vent opening and press "Pulse" 6-8 times. Add other ½ cup buttermilk through vent opening and press "Pulse" 8-12 times until dry ingredients are just incorporated.
Use Spoonula or spatula to scrape sides of WildSide jar, then dump biscuit dough onto floured surface. With floured hands, pat down dough to approximately 1-inch thick. Use floured biscuit cutter or cookie cutter to cut into rounds. Put dough scraps together and cut out remaining biscuits.
Place on cookie sheet and bake for 12-14 minutes.