How do you pronounce 'frappé'?
Solution 1:
Frappé is pronounced fruh-pay, if it's a frozen, fruity, sherbet-like thing, or a liqueur poured over shaved ice.
If it's a milkshake thing, it's frappe (note the absence of the accent mark). And then it rhymes with clap.
Presumably that's the reason for some confusion.
Source: http://www.thefreedictionary.com/frapp%C3%A9