Ingredients:

1 cup flour
1 tsp. baking powder
1/2 tsp baking soda
1/2 tsp salt
1/2 tsp. cinnamon
2 Tbsp. butter
1/2 cup sugar

1/2 cup unpacked brown sugar
1 large egg
1/4 cup unsweetened apple sauce
1/2 tsp.  vanilla extract
2 cups quick oats
3/4 cup dark chocolate chips
​3/4 cup walnuts

Directions:

Preheat oven to 350 degrees and line cookie sheet with parchment paper.
In a medium bowl, whisk together flour, baking powder, baking soda, salt, and cinnamon.
In a large bowl with mixer, cream together the butter and the sugars on medium speed.
Add the egg, followed by the applesauce and vanilla extract.
Working by hand, stir in the flour mixture and the oats until just combined and no streaks of flour remain; stir in chocolate chips, and nuts.