Place 1 1/2 cups rolled oats in a blender or food processor and pulse until they reach a flour-like consistency. Transfer the oat flour to a large bowl.
Add the remaining 1/2 cup rolled oats, 1/2 cup clean protein powder, 1/2 cup mini chocolate chips, 1/2 cup chia seeds or ground flax seeds, and 1/2 cup raisins to the bowl; stir to combine evenly.
In a medium bowl, stir together 1 cup natural peanut butter, 1/2 cup lite coconut milk, and 1/4 cup raw honey until smooth. If the mixture is too thick to mix into the dry ingredients, add additional lite coconut milk a little at a time until it reaches a spreadable consistency.
Pour the peanut butter mixture over the oat mixture and stir thoroughly until all dry ingredients are moistened and evenly distributed.
Transfer the mixture to a 9 x 9-inch pan or an 11 x 7-inch pan and press it down firmly and evenly. Cover with a lid or foil and refrigerate overnight or until the mixture firms up.
Remove from the pan and slice into 12 bars. Store the bars in the refrigerator.