Sweet wines produced with dried grapes are among the most ancient examples of wine making, wines of which most of poets and writers of the past have mentioned in their writings, praising their remarkable quality and finesse. A style of wine very liked in the past - and certainly distant from the concept of wine we have nowadays - sweet wines have with time left the scene to the ones today considered the emblem of the wine itself, the so called table wines, with a decidedly dry taste. Of course, sweet wines did not decline and - luckily - they are produced still today, genuine nectars of the grape, a concentrated juice of vine's soul. Among the most famous and historical sweet wines, having a quite evocative name, there is Vin Santo (literally Holy Wine), typically associated to the regions of central Italy - in particular Umbria and Tuscany - also common in other regions. In the Canavese area, between Turin and Valleé d'Aoste, there is an interesting white berried grape, with uncertain origins, with which are being produced very good dry wines as well as excellent sweet wines: Erbaluce.

	Erbaluce di Caluso Passito and Vin Santo of our comparative tasting

 The origin of Erbaluce grape is uncertain, however it is believed this white berried variety originates from the Canavese area, the territory between Turin and Vallée d'Aoste. The spreading of Erbaluce is practically limited to this territory and, in particular, to Caluso, a town which associated its name to Erbaluce grape and that, in October 2010, has obtained the Denominazione d'Origine Controllata e Garantita recognition (Denomination of Controlled and Guaranteed Origin, DOCG). A very versatile grape, thanks to its remarkable acidity as well as the good sweetness of its berries, with Erbaluce are being produced many styles of wine, from dry table wines to sparkling wines, as well as sweet wines, a style always benefiting from grape's acidity in order to have a proper balance. Wines belonging to Erbaluce di Caluso appellation are produced in the Canavese territory, in the provinces of Turin, Biella and Vercelli.

 According to a historical point of view, the first written evidence of Erbaluce is dated back to 1606, mentioned in the book “Della eccellenza e diversità dei vini che sulla montagna di Torino si fanno e del modo di farli” (On the excellence and differences of wines produced in the mountain of Turin and the way to make them) written by Giovan Battista Croce, jewelry of duke Carlo Emanuele I. In this book is in fact written «Erbaluce is a white grape called “alba luce” (light of the dawn) because shines to sun rays: it has round berries in great number and a quite hard skin: when it ripens, it becomes roasted and colored and it can stay in the plant for a long time». This also explains the origin of the name, recognizing it in “Alba Luce” (light of the dawn), corrupting the term alba in “erba”. The name “Alba Luce” however has origins from Roman times and therefore to Latin Alba Lux, for the reason mentioned by Croce, that is for the characteristic of berries of getting a strong pink-coppery color at the apex of ripeness. Acidity and a good content in sugar, make of Erbaluce an excellent grape for the production of sweet wines.

 The most famous representation of sweet wine in central Italy certainly is Vin Santo. This historical wine is typically associated to the enology of Tuscany, indeed its production and its history are strongly associated to the whole territory of the central part of the country. This wine is in fact typical in all the regions of central Italy - Tuscany, Umbria, Marches and Latium - as well as being produced in other regions, such as Trentino, where it is used Nosiola grape, and Veneto, produced with Garganega grape. The varieties mainly used for its production are white, with the exception of the so called Occhio di Pernice (literally, eye of the partridge) - a style typical in southern Tuscany - made with Sangiovese grape and, sometimes, with white berried varieties. The main grape used for the production of Vin Santo (literally, holy wine) is Trebbiano Toscano, a variety having a remarkable acidity, to which are added - according to the production area - Malvasia Bianca, Grechetto, Passerina, San Colombano. Trebbiano Toscano is generally found in every Vin Santo, however there are cases in which this variety is not used at all.

 There are many theories about the origin of the name “Vin Santo”, however the most credible one - as well as being the most common one - comes from the habit of doing the first racking of the wine during the Holy Week of Easter. The production of Vin Santo begins with the late harvesting of the best grapes, then left to whiter in mats or in straw, usually in well aerated rooms under roof. In this phase, aeration is very important, not only to favor the reduction of water in berries, but also for avoiding the dangerous development of molds. Dried grapes are then crushed and allowed to ferment in small barrels - called caratelli, with a volume of about 50 liters - an operation which can also last many months, sometimes years, because of the high content of sugar. Traditional production, not very used today, consists in adding the must of dried grapes to the caratelli in which is contained the so called “madre” (mother), that is the residual of past vinifications, very rich in yeast and bacteria, as well as complex organoleptic qualities. Today, in most of the cases, producers prefer not to use the “madre”, indeed they prefer to start fermentation by adding selected yeast, therefore ensuring a more controllable production.

 The tasting of this month will compare two sweet wines produced in distant territories - one in Piedmont, the other in Tuscany - and with different grapes, however having in common a high acidity, a fundamental requisite in order to get a balanced and harmonic wine. The first wine of the tasting is Orsolani's Erbaluce di Caluso Passito Sulè, produced with the homonymous grape, fermented, and then aged, in barrique for three years. The second wine of the comparative tasting is Bindella's Vin Santo di Montepulciano Dolce Sinfonia, produced with Trebbiano Toscano and Grechetto grapes, fermented and aged for three years in traditional caratelli, as well as one year in bottle. The two wines will be tasted at the temperature of 14°C (57°F), enough to limit the sensation of sweetness while allowing a good development of aromatic qualities. The wines will be poured, as usual, in two ISO tasting glasses.

 The color of sweet wines, thanks to the effects of the concentration of must and the oxidation received during aging, frequently shows deep and intense colors with amber and golden yellow hues. The color is also determined by the specific variety of the grape, the moment of harvesting and the length of the withering process. Transparency in white sweet wines is pretty high - of course lower than common white table wines - confirmed by the good observation of an object's details put behind the glass. Color and transparency are also determined by the techniques used for aging, not only time, in particular the type of container. Sweet wines aged in casks - as well as caratelli and barrique - generally show deeper and more intense color than the ones aged in inert containers, such as steel or cement tanks. Also the volume of cask directly influences the color of wine in function of the ratio between the surface of contact of the wine inside the cask and its volume.

 We will start appearance analysis of our comparative tasting from Orsolani's Erbaluce di Caluso Passito Sulè. By holding the glass tilted over a white surface, let's observe the base of the glass, in the point of wine's higher thickness. The color of this wine is characterized by a strong amber yellow hue, intense and brilliant, fruit of three years of aging in barrique. The nuance of this wine - observed at the edge of the liquid mass, towards the opening - does not seem to change, also in this case can be observed an amber yellow color. Let's now pass to the analysis of Bindella's Vin Santo di Montepulciano Dolce Sinfonia. The color of this Vin Santo is quite similar to the previous wine, also in this case can be observed an intense and brilliant amber yellow color, however deeper and darker than the previous one. Nuance, observed towards the opening of the glass, confirms the color of this wine with a brilliant amber yellow hue.

 The analysis of the olfactory profile in sweet wines differs from regular table wines for the richness and complexity of their aromas. Thanks to the concentration of grapes as a consequence of withering and the long period of aging, the aromas in these wines get extremely complex and dense qualities, of a richness having no equals in other wines. The primary aromatic qualities of the grape is highly amplified, in particular in wines produced with real aromatic grapes, such as Muscat Blanc. In these wines can be mainly perceived aromas recalling dried fruits, as well as fruit jams and honey. During the withering of grapes it could also happen the development of noble rot - the so called Botrytis Cinerea - which, in favorable conditions, enriches wines of a charming elegance. The aging in wood containers, besides adding aromas caused by the effects of oxidation, favors the development of complex spicy aromas as well as the characteristic aroma of vanilla.

 Orsolani's Erbaluce di Caluso Passito Sulè is the first wine of which we will examine the olfactory profile. By holding the glass in vertical position and without swirling, we will proceed with the first smell in order to appreciate the opening aromas of the wine. From the glass will be perceived intense and clean aromas of raisin, dried fig and honey. In particular, raisin is a very characteristic and typical aroma in the opening of sweet wines. Let's now proceed with the swirling of the glass and then with the second smell, completing the aromatic sequence of the wine with candied fruits, quince jam, dried apricot, peach jam, orange marmalade, date, hazelnut, saffron and vanilla, as well as a pleasing hint of nail polish. Let's now pass to the evaluation of Bindella's Vin Santo di Montepulciano Dolce Sinfonia. The opening of this wine is characterized by raisin, dried fig, walnut and honey, not so different from the previous wine. After having swirled the glass, the wine will be completed with the aromas of date, quince jam, almond, dried apricot, candied fruits, citrus fruit peel and vanilla, as well as a pleasing hint of nail polish.

 The amazing sensorial experience of sweet wine analysis continues with tasting. Wines rich and dense, of thickness and generally having a long taste-olfactory persistence, the analysis of taste in sweet wines frequently confirms what was anticipated to the nose. The first sensation which can be perceived in the mouth, and of course the most expected one, is characterized by the typical sweet taste, fruit of the residual sugar contained in the wine and not fermented. Sweetness, despite it is the main and most characteristic quality, needs other and contrary organoleptic stimuli in order not to be cloying and excessive, and the most important one certainly is acidity. Balance in sweet wines is obtained by the relationship between sweetness and acidity, last but not the least, by astringency - in case of sweet red wines - by alcohol and the round and smooth sensation perceived in the mouth, not to be confused with the real sweetness. In these wines the alcohol by volume generally is quite high - reaching in certain cases 16% - a very important factor for balancing sweetness.

 The first wine of which we will evaluate the tasting profile is Orsolani's Erbaluce di Caluso Passito Sulè. The attack of this wine - that is the sensation perceived in the mouth during the first sip - reveals an evident sweet taste, an expected quality soon balanced by acidity, that in Erbaluce grape is pretty strong, therefore by the burning effects of alcohol and smoothness given by roundness. In the mouth can be perceived a very good correspondence to the nose, in particular the flavors of raisin, dried fig and honey. Let's now pass to the tasting of Bindella's Vin Santo di Montepulciano Dolce Sinfonia. Also the attack of this wine is characterized by an evident sweetness, soon balanced by acidity and followed by the effect of alcohol and roundness. Also in this case, a very good correspondence to the nose with flavors of raisin, dried fig, walnut and honey. Both wines are characterized by a very good and long taste-olfactory persistence, leaving in the mouth a pleasing sensation of sweetness to which is opposed an equally pleasing sensation of crispness.