A controversial last-gasp penalty by Mikel Arteta handed Everton their first win of the season after Blackburn dramatically missed two spot-kicks.
Tim Howard was Everton's earlier hero when he saved a 46th-minute penalty from Blackburn's Junior Hoilett.
The giant American keeper then watched Mauro Formica's 77th-minute spot-kick slam against the post.
Arteta's late winner came after referee Lee Mason ruled Chris Samba had flattened Marouane Fellaini.
Despite a host of complaints from incensed Blackburn players, the penalty was awarded in the second minute of stoppage time and Arteta's confident finish condemned Steve Kean's men to their third successive league defeat.