During one immunity challenge on Survivor: The Amazon, Morasca and fellow contestant Heidi Strobel stripped off their clothes for Peanut butter and chocolate. After making the merge, Morasca was relatively safe at the start as the majority of the tribe chose to vote off outcasts Roger Sexton and Dave Johnson. With eight players remaining, the new alliance of Morasca, Strobel, Alex Bell and Rob Cesternino targeted Deena Bennett, and she was voted out. At the Final Seven, Cesternino betrayed his alliance by voting out Bell. At the Final Six, Morasca and Strobel scrambled to stay in the game, trying to break up the alliance of Cesternino, Matthew Von Ertfelda and Butch Lockley. When Christy Smith would not commit to either side, Cesternino convinced Morasca and Strobel to help vote out Smith, who was indeed voted off. At the Final Five, Strobel was voted out, but Morasca won the next immunity, protecting her in the vote of the Final Four. Morasca, Cesternino and Von Ertfelda voted out Lockley. Morasca again won the next immunity challenge and voted off Cesternino. Morasca beat Von Ertfelda in a 6–1 vote to become the Sole Survivor. Morasca was the youngest contestant to ever win Survivor until Jud "Fabio" Birza won Survivor: Nicaragua, though Morasca remains the youngest female contestant to win Survivor.