Make the Strawberry Layer:
In a blender, combine the strawberries, milk, yogurt (or ice cream), sweetener, and ice.
Blend until completely smooth.
Pour this into the bottom of your glass and place it in the freezer for a few minutes to help it firm up slightly.
Make the Mango Layer:
Rinse your blender, then add mango, milk, yogurt, vanilla extract, and ice.
Blend until smooth.
Carefully pour this layer over the strawberry layer using a spoon or pouring slowly down the side of the glass to keep the layers distinct.
Make the Blueberry Layer:
Rinse the blender again, then add blueberries, milk, yogurt, sweetener, and ice.
Blend until smooth.
Gently layer this on top of the mango blend. Use a spoon again to pour slowly for a nice, clean separation.
Add Toppings (Optional):
Top with whipped cream and a few pieces of fresh fruit or a drizzle of syrup for extra sweetness and style.