Pour batter into loaf pan and freeze for one hour.
make frosting
Add the chia seeds to the almond milk and allow it to sit for 20 minutes or longer until the seeds have absorbed the liquid. Then blend until creamy.
Add in chocolate chips to a glass measuring cup and microwave for 60 seconds until melted.
Add the chia seed mixture and the cashew butter to the melted chocolate chips. Stir until creamy. You can add a touch of milk if the mixture is not creamy enough.
Frost Brownies
Frost the brownies, cut and serve. Refrigerate for one week or freeze for long term storage.