01 - Place strawberries, sugar, and lemon juice in a blender. Blend until completely smooth, creating a uniform berry puree.
02 - Add whole milk, heavy cream, vanilla extract, and ice cubes to the blender. Blend on high speed until fully combined and frothy with a slushy consistency.
03 - Taste the frappuccino mixture. Add additional sugar if needed and blend briefly to incorporate.
04 - Pour the blended frappuccino evenly into two tall glasses. Top with whipped cream and fresh sliced strawberries if desired. Serve immediately while cold.