In a large heavy bottomed saucepan, bring the maple syrup to a
boil over medium-high heat stirring occasionally. Boil until syrup
reaches 235 degrees F (110 degrees C) on a candy thermometer.
Remove from heat and cool to 175 degrees F (80 degrees C) without
stirring, about 10 minutes. Stir mixture rapidly with a wooden
spoon for about 5 minutes until the color turns lighter and mixture
becomes thick and creamy. Stir in chopped nuts, if desired. Pour
into molds. Set aside to cool. Once cool, unmold candy. Store in
airtight containers up to 1 month. via: allrecipes.com