In a small bowl, combine the Greek yogurt and vanilla extract, stirring until evenly distributed throughout.

Add the protein powder and stir vigorously for 60 to 90 seconds until completely smooth with no visible lumps.

Taste the dip. If it needs more sweetness, stir in the maple syrup until it reaches your preferred sweetness level.

If serving immediately, gently fold in the rainbow sprinkles. Top with additional sprinkles and serve. If not serving right away, refrigerate for 30 minutes for thicker texture and add sprinkles just before serving to keep colors vibrant.