Preheat your oven to 425°F (218°C) and line a baking sheet with parchment paper.
Prepare the chicken by patting it dry. In a shallow bowl, lightly whisk the egg white.
Dip each chicken breast into the egg white, then coat evenly with whole wheat breadcrumbs.
Place the coated chicken on the prepared baking sheet and lightly spray or drizzle with a small amount of olive oil if desired.
Bake the chicken in the preheated oven for about 18-20 minutes, or until the chicken reaches an internal temperature of 165°F and the coating is crispy.
While the chicken bakes, prepare the biscuit dough. In a bowl, combine whole wheat flour, baking powder, and a pinch of salt.
Cut in the cold unsalted butter until the mixture resembles coarse crumbs.
Stir in skim milk until just combined, being careful not to overmix.
Turn the dough onto a lightly floured surface, pat it into a 1/2-inch thick round, and cut out biscuits using a round cutter or glass.
Place the biscuits on a separate baking sheet lined with parchment paper.
Once the chicken is nearly done, place the biscuits in the oven and bake for 12-15 minutes until they are lightly golden and fluffy.
Remove both the chicken and biscuits from the oven, plate them together, and serve warm.