Foodie Thoughts for 17 December
Foodie fans today is National Maple Syrup Day. There isn't anything better than a nice stack of hot cakes with warm maple syrup!
Maple syrup originates in northeastern North America, and is commonly associated with Quebec in Canada and Vermont in the U.S. However, given the correct weather conditions, it can be made wherever maple trees grow. Usually, the maple species used are the sugar maple (Acer saccharum) and the black maple (Acer nigrum), because of a high sugar content in the sap of roughly two percent. A maple syrup production farm is called a "sugar bush" or "the sugarwoods". Sap is boiled in a "sugar house" (also known as a "sugar shack" or cabane à sucre), a building which is louvered at the top to vent the steam from the boiling sap.
Canada makes more than 80 percent of the world's maple syrup, producing about 7 million US gallons in 2005. The vast majority of this comes from Quebec: the province is by far the world's largest producer, with about 75 percent of the world production (6.515 million US gallons in 2005). The provinces of Ontario, Nova Scotia, and New Brunswick produce smaller amounts.
Vermont is the biggest U.S. producer, with 410,000 US gallons in 2005, followed by Maine, New York, Ohio, and then a half-dozen other states with smaller industries.
Traditionally, maple syrup was harvested by tapping a maple tree through the bark and into the wood xylem, then letting the sap run into a bucket, which required daily collecting; less labour-intensive methods such as the use of continuous plastic pipelines have since superseded this, in all but cottage-scale production.
Production is concentrated in February, March, and April, depending on local weather conditions. Freezing nights and warm days are needed in order to induce sap flows. The change in temperature from above to below freezing causes water uptake from the soil, and temperatures above freezing cause a stem pressure to develop, which, along with gravity, causes sap to flow out of tapholes or other wounds in the stem or branches. To collect the sap, holes are bored into the maple trees and tubes (taps, spouts, spiles) are inserted. Sap flows through the spouts into buckets or into plastic tubing. Modern use of plastic tubing with a partial vacuum has enabled increased production. A hole must be drilled in a new location each year, as the old hole will produce sap for only one season due to the natural healing process of the tree, called walling-off. Maple sap is collected from the buckets and taken to the sugar house; if plastic tubing and pipelines are used, then the pipelines are arranged so that the sap will flow by gravity into the sugar house, or if that is not possible, into holding tanks from which the sap is pumped or transported by tanker truck to the sugar house.
During processing, called sugaring-off, the sap is fed automatically from a storage tank through a valve into a flat pan called an evaporator where the sap boils down until so much water is lost that it forms a sweet syrup. The process is slow, because of amount of water that must be boiled off. Approximately 40 litres of sap must be boiled down to make one litre of maple syrup (i.e., 39 litres of water must be boiled off). A mature sugar maple produces about 40 litres (10 gallons) of sap during the 4-6 week sugaring season. Trees are not tapped until they have a diameter of 25 centimetres (10 inches) at chest-height and the tree is at least 40 years old. Most contemporary producers use a 5/16" or 19/64" (7.94 mm or 7.54 mm) outside diameter drill bit to drill with. A tap hole depth of 1" to 1 1/2" (25 mm to 38 mm) is a commonly recommended depth.
Starting in the 1970s, some maple syrup producers started using reverse osmosis to remove water from sap before being further boiled down to syrup. The use of reverse osmosis allows approximately 75 to 80% of the water to be removed from the sap prior to boiling, reducing energy consumption and exposure of the syrup to high temperatures. Microbial contamination and degradation of the membranes has to be monitored.
Maple syrup is sometimes boiled down further to make maple sugar, a hard candy usually sold in pressed blocks, and maple taffy. Intermediate levels of boiling can also be used to create various intermediate products, including maple cream (less hard and granular than maple sugar) and maple butter (creamy, with a consistency slightly less thick than peanut butter).
Starting in the mid 80's, northern communities in the province of Quebec began to open the "Cabane à Sucre" or Sugar Shacks to the public. These sugar shacks were generally located on large maple farms and often were built solely for tourist purposes. These sugar shacks serve maple syrup direct to the public and also are often restaurants serving maple syrup inspired meals and treats






