Prepare a 9x5 loaf pan by spraying it with cooking spray. Set aside.
In a medium-sized mixing bowl, combine oat flour, quick oats, protein powder, and crispy rice cereal. Mix until well combined and set aside.
In a small pan over medium heat, add almond butter and honey, stirring until the almond butter is melted and fully combined with the honey. Stir in vanilla extract.
Remove from heat and pour into the dry mixture. Stir until everything is fully combined. Pour into prepared loaf pan. Using a spatula or your hands, spread the mixture evenly in the pan, pressing down firmly.
*Optional: place chocolate into a microwave safe bowl and nuke on high in 20 second intervals, mixing between each. When chocolate is fully melted, drizzle over the top of the packed mix using a spoon.
Place pan into fridge and allow to cool for ~30 minutes before cutting into bars.