Preheat the oven to 350°F. Line an 8-inch square baking pan with parchment paper.
Pulse ½ cup walnuts into small pieces in a food processor.
In a large bowl, mash banana with a fork. Add maple syrup, coconut oil, egg and vanilla extract. Whisk until well incorporated. Add the pureed walnuts, oats, cinnamon, salt, baking powder and baking soda. Stir to combine. Fold in half of the chocolate chips, raisins and pepitas. Fold in 2 tablespoons of the walnuts.
Pour the mixture into the prepared baking pan. Using a rubber spatula, smooth into an even layer. Sprinkle the remaining chocolate chips, raisins, walnuts and pepitas on top.
Bake 15 minutes or until lightly golden around the edges. Remove from oven and cool slightly. Slice into small bars and enjoy!
Video
Notes
STORAGEStore the bars at room temperature in an airtight container for up to a week.