01 - Combine strawberries, sugar, and lemon juice in a blender. Blend until completely smooth, ensuring no fruit chunks remain.
02 - Add milk, heavy cream, vanilla extract, and ice cubes to the blender. Blend on high speed until fully combined, frothy, and slushy consistency is achieved.
03 - Taste the mixture and add additional sugar if needed to achieve desired sweetness level. Blend briefly to incorporate any additions.
04 - Pour the frappuccino evenly into two tall glasses. Top with whipped cream and fresh sliced strawberries if using. Serve immediately while cold.