Add the Greek yogurt to a medium-sized mixing bowl.

Sift the protein powder into the bowl to prevent clumping.

Using a whisk or heavy spoon, stir the mixture vigorously until the powder is fully incorporated and the texture is smooth.

Gradually add the liquid one teaspoon at a time if the mixture is too thick, continuing to stir until the desired pudding consistency is reached.

Serve immediately or chill for 30 minutes for a firmer texture.