01 - Add milk, vanilla ice cream, strawberries, and sugar to blender container.
02 - Blend on high speed until completely smooth and creamy, approximately 45-60 seconds.
03 - Taste mixture and add additional sugar if desired, blending briefly to incorporate.
04 - Divide milkshake evenly between two tall glasses.
05 - Top each glass with a generous swirl of whipped cream.
06 - Sprinkle rainbow sprinkles generously over whipped cream topping.
07 - Serve promptly with straws while milkshake remains thick and cold.