The following sites, all connected with (historical) cooking, are among my personal favourites:

a FOOD WORD site
by Andrew Dalby, the most learned and passionate author on Greek and Roman gastronomy

Coquinaria.nl
cooking through the ages by Christianne Muusers

ALL ABOUT EATING
a very appetizing blog by Elisabeth J. Meiboom

The Old Foodie
faits divers from the world's culinary history

Gode Cookery
mostly Mediaeval