Mix oats, milk and water in a medium saucepan over medium high heat.
Cook for 15 minutes uncovered, stirring occasionally as the oats start to cook.
While the oats cook, mix together yogurt, peanut butter powder and vanilla protein powder in a separate bowl until combined. We highly recommend mixing in a separate bowl rather than adding directly to the pot because if you add the peanut butter powder and protein powder directly to the oats, it can get clumpy.
Once the oats are cooked and there is just a little bit of liquid left in the pot, remove the oats from the heat. Stir the yogurt mixture into the oats until combined.