Add brown rice cereal to a large mixing bowl and set aside.
In a microwave safe bowl, place peanut butter and honey. Microwave for 40 seconds (in 10-second intervals each time to avoid ingredients from burning), until mixture is soft and smooth. Add in protein powder and mix until smooth.
Pour peanut butter mixture into the brown rice cereal and use hands to combine well.
Transfer mixture into a muffin tray, filling up eight of the twelve muffin spots to the top, pressing each firmly to shape them properly.
Refrigerate for 1 hour.
Before serving prepare glaze. Add cacao butter chips to a microwave safe bowl and microwave for 45 seconds (in 15-second intervals each time to avoid cacao from burning), until cacao butter chips have melted. Once melted, add in coconut butter and coconut milk, and mix until smooth. Use a spoon to drizzle glaze over Rice Krispy Cups. Add sprinkles on top and enjoy!