Blend oats into your protein shake for a thicker, more sustaining pre workout drink. It'll keep your energy steady through even the longest gym sessions.
Add rolled oats to the blender and pulse for 10–20 seconds until finely ground.
Add protein powder, milk, banana, peanut butter, and cinnamon to the blender with the ground oats.
Blend on high speed for 45–60 seconds until completely smooth, scraping down the sides as needed.
Add ice cubes, then blend again for 20–30 seconds until the shake is cold and frothy.
Pour into chilled glasses and let sit for 1–2 minutes for optimal thickness before serving.