Add the protein powder and Greek yogurt to a medium bowl. Pour in half of the milk (about 1/4 cup). Whisk aggressively for 30-45 seconds until the mixture is completely smooth with no visible powder clumps.

Slowly drizzle in the remaining milk (about 1/4 cup) while continuing to whisk constantly. Whisk for another 30 seconds until the pudding reaches a smooth, creamy consistency.

Let the pudding sit undisturbed for 3-5 minutes to allow the protein powder to absorb the liquid and thicken.

Give the pudding a final gentle stir. Taste and adjust sweetness if needed. Top with your favorite additions and serve immediately, or refrigerate for a chilled treat.