01 - Add the strawberries, milk, vanilla ice cream, and sugar to a blender.
02 - Blend on high speed until the mixture is smooth and creamy, approximately 30 seconds.
03 - Taste the shake and adjust the sweetness by adding more sugar if necessary.
04 - Pour the milkshake into chilled glasses. Top with whipped cream and slices of fresh strawberry if desired, and serve immediately.