It’s said that fruit-driven Vintage Ports reflect the vintage conditions and aged Tawnys reflect the Port House style which is a complex blend of wines from different vintages.  The House style can be drier than sweeter, or fruity vs. complex.  It is up to the winemaker to determine how to achieve the House style using a mix of grapes and vineyard locations, a range of vat sizes, a vast inventory of existing blends and vintage wines, and a blending philosophy.
Graham’s House style, for example, is rich and sweet, while Warre’s …

Ageing of wine in wood adds complexity to wine and is influenced by the type of wood used, its origin, how it was cured, age of wood,  length of ageing and  size of container.  Another important element in the winemaker’s recipe book is the toasting level.  Toasting of wood in new barrels is done at the time the barrel is made, when the staves are being shaped over an oak fire.  Toasting can enhance or create flavors from the breakdown of carbohydrate, phenolic or fatty compounds in wood, resulting in aromas such as spice, nutty, espresso, vanilla and coconut.  There …