Eating Avalanche (¥1,350) at the Marunouchi Ozao branch of Belgian patisserie Debailleul is like falling in love. You can’t get the treat off your mind and the silly grin off your face. As bitter hot chocolate is poured onto it, the spherical chocolate shell melts and crumbles away like an avalanche, which explains the name of the dessert. Inside you’ll find bits of white cookie dough and vanilla ice cream. Warning: This dessert may induce the most powerful foodgasm of your life. (1F Marunouchi Oazo, 1-6-4 Marunouchi, Chiyoda-ku, Tokyo; 03-5224-3565; www.debailleul.jp).