Prepare the Base: In a blender, combine milk, vanilla ice cream, crushed Oreos, sweetened condensed milk, ice, and vanilla extract. Blend until smooth.
Divide and Color: Pour the blended mixture into three separate bowls. Add blue food coloring to one, purple to another, and pink to the last. Stir each until fully incorporated.
Create the Galaxy Effect: Pour each colored mixture back into the blender, but pulse only once or twice to create a marbled swirl without fully mixing the colors.
Assemble the Drink: Pour the frappuccino into a tall glass. Swirl a spoon through the mixture to enhance the galaxy effect.
Add Toppings: Top with whipped cream, extra crushed Oreos, and a sprinkle of edible glitter or star-shaped sprinkles for a cosmic touch.
Serve Immediately: Enjoy your galaxy-inspired Oreo frappuccino while it's cold and creamy.