Melt the White ChocolateIn a microwave-safe bowl, heat the white chocolate chips (or chopped white chocolate) in 20-second intervals, stirring between each interval until completely melted. Be careful not to overheat it, as white chocolate can burn easily. Once melted, let it cool slightly.
Prepare the Frappe BaseIn a blender, combine the milk, ice, cooled brewed coffee (or espresso), melted white chocolate, sugar (if using), and vanilla extract. Blend on high speed until smooth and frothy, ensuring the ice is crushed and the mixture is well-combined.
Serve the FrappePour the frappe into a tall glass, leaving some space at the top for the whipped cream.
Top and GarnishGenerously top the frappe with whipped cream. Drizzle some white chocolate sauce or syrup over the whipped cream for an extra touch of sweetness and decoration.
Enjoy!Serve immediately with a straw or spoon and enjoy this creamy, cool treat.