tert-Amyl ethyl ether (TAEE) is a chemical compound, classified as an ether, with the molecular formula C<sub>7</sub>H<sub>16</sub>O. It is used as an additive in gasoline fuels as an oxygenate and also as a solvent in organic chemistry.
TAEE is prepared by acid-catalyzed addition of ethanol to 2-methyl-2-butene.