Tuber Brumale is rather similar with Tuber Aestivum and Uncinatum in terms of shape and colour, but its surface is smoother and the so callerd warts are smaller. The winter truffles do not grow as much in diameter as the other truffles,usually they reach the size of nutts and their smell is a strong, musk-like. Their external colour is dark brown or black with blue shades, while the interiour is white or dark grey marbled, and the ribbes are widder than at the Aestivum and Uncinatum.
If stored at room temperature, the aromatic compounds dissipate, while storage at around the freezing point (0 °C) leads to an increased synthesis of these compounds.
Generally they range between that of a walnut to that of an orange.
Warty, consisting of small black warts and little pointed out.
Brownish gray, crossed by white veins, large and sparse.
Aromatic, delicate pleasant.
Exquisite, is not altered by cooking. The flavor is especially appreciated by those who love strong flavors of fresh truffles.
From mid-January to March.
Calcareous-gravelly, permeable develops to a depth of 5-10 and 25-30 cm.
Preferably facing south and west under isolated trees or in sparse forests to allow the lighting, ventilation and heating from the sun.
Oak and hazel.
Italy, especially in Umbria, Marche, Abruzzo and Piedmont.
Slovenia, the Istrian region.
France, in the Périgord, where it is well known and is great space in the kitchen; in Italy and Slovenia it is less used.
How to recognize it: it is similar to the black fine truffle, from which it differs mainly because of the grayish tones of the glebe, because of the more obvious veins and the strong scent, similar to the turnip. There are a variety of “brumale” truffle with a strong musky scent, the so-called muscatel truffle.