How do you judge six versions of a traditional French cake which you've had maybe once in anything resembling its authentic form? We're not entirely sure, but we did it anyway yesterday as one of five judges for the Buche de noel competition for Cafe des Architectes' Holiday Rock & Roll event, benefiting Share Our Strength. Buche de noel, or Yule Log, is a traditional holiday cake in the shape of a log. Our fellow judges included two other media folk (Louisa Chu of WBEZ and Laura Baginski of Time Out Chicago), as well as two professionals— Bob Hartwig of Lovely Bakeshop and Peter Yuen of Patisserie P. We evaluated six cakes by noted pastry chefs, judging them anonymously and not only by the flavor but by the creativity of their play on the traditional log theme. In addition to the winner we chose, attendees at the event got to taste and choose their own favorite (not the same as ours, though one we personally had rated highly as well). See the gorgeous cakes and who won in our slideshow, below.