Line a medium (approx. 9x13 inch) sheet pan with parchment paper and grease the bottom and sides with softened butter. Alternatively you can spray with your favorite cooking spray.
In a large bowl stir together the dry ingredients - all purpose flour, baking powder, cinnamon, nutmeg, salt and protein powder.
In a small bowl, whisk together the milk, eggs, melted butter and maple syrup.
Mix until just combined. You will get a dough thats more like a thicker cake batter; if you find the dough too thick stir in 2 tbsp - 1/4 cup more milk. Gently fold in the apples.
Pour the batter onto the prepared baking sheet and sprinkle with white chocolate chips if desired.
Bake for 10-15 minutes until the center of the pancake is springy to the touch and a toothpick inserted in the center comes out clean.
Allow to cool 5-10 minutes before slicing into 10-12 portions.
Enjoy slices with maple syrup and butter or on the go as a single slice. See notes for meal prep options.
Video
Notes
Protein powder: We have not tested any other types but a whey protein may also work; you may just need less milk for the dough for other protein types.Slice and store in the refrigerator for up to 3 days for easy on the go breakfasts. Freeze slices, individually wrapped, for up to 1 month.Try other fruits: Swap the apple for 1-2 cups blueberries.