Measure out the protein powder, Greek yogurt, and milk, then place them in a small mixing bowl.
Use a spoon or whisk to blend the ingredients together, generating a thick, smooth batter with a creamy texture. Add more milk gradually if it feels too stiff.
Once the mixture is well combined and resembles a slightly fluffy, pudding-like consistency, gently fold in the sprinkles to distribute their color evenly.
Transfer the batter into a serving bowl, smoothing the top with the back of a spoon for an even surface.
Sprinkle additional rainbow sprinkles on top for a fun, colorful appearance and a slight crunch.
Now, enjoy your cake batter protein bowl as a quick, delightful breakfast or snack—its creamy texture and vibrant toppings make every bite a cheerful experience.