toasty

A smell of grilled toast can often be found in wines because the barrels the wines are aged in are charred or toasted on the inside.
Found on http://www.erobertparker.com/info/glossary.asp

Toasty

Refers to an aroma and flavor that originates from the oak barrels in which wines are aged and also a character that is present in some sparkling wines.
Found on http://www.winetasting.com/Glossary

Toasty

The barrel smell and taste imparted to oak-fermented white wines.
Found on http://www.hernder.com/content/article.cfm?RecordID=13
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