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 Hot Chocolate is mentioned several times in The Hunger Games. When Katniss is  on the tribute train to the capitol she is given Hot Chocolate. With Katniss's notice for all things food related we get a mouth watering look at Capitol Hot Cocoa. Later in book one she copies Peeta by dipping her roll into the Hot Chocolate.
"A cup of coffee. My mother adores coffee, which we could almost never afford, but it only tastes bitter and thin to me. A rich brown cup of something I’ve never seen. “They call it hot chocolate,” says Peeta. “It’s good.” I take a sip of the hot, sweet, creamy liquid
and a shudder runs through me. Even though the rest of the meal beckons, I ignore
it until I’ve drained my cup." (The Hunger Games)