Gobber: Are you sure you've got the recipe right? Fishlegs: Of course I'm sure, three parts limestone... Snotlout: WHOO-HOO-HOO-HOO!!! Gobber: Yeah, three parts limestone... Fishlegs: Uh-huh! Hiccup: Give it all you've got, bud. Fishlegs: Two parts sandstone... Gobber: Sandstone, check. Fishlegs: One part iron ore...uh-huh, a down low! Gobber: Yeah-heh... Fishlegs: And now...the secret ingredient... Fishlegs: Once giant spoon of cooled and hardened Gronckle lava! Gobber: Gronckle lava, of course! Fishlegs: Voila! You have Gronckle Iron. Fishlegs: Be our guest. Astrid: Stormfly, spines. Tuffnut: Teeth...