These delicious walnut muffins are at their best if you can get genuine maple syrup. If you can't, you can substitute with artificial.
Just a tip for those disappointed in the weak maple flavor: When baking with maple syrup, it is a good idea to use Grade B syrup, which is stronger flavored and intended for baking or cooking rather than as a table syrup. - 07 Mar 2005 (Review from Allrecipes USA and Canada)
I didn't use real maple syrup because artifically flavored-maple syrup has a much stronger maple flavor. I omitted the walnuts and added a crunchy topping (3 tbs. flour, 3 tbs. sugar, 1/2 tsp. cinnamon, 2 tbs. chopped pecans) sprinkled over the muffin batter. I added 1/4 cup of sour cream for extra moistness. SO GOOD!!!! - 02 Jul 2007 (Review from Allrecipes USA and Canada)
My whole family loved them! I cut the salt. I added 1/2 teaspoon cinnamon and 1 teaspoon vanilla extract. I will definitely be making these again soon! - 04 Jul 2008 (Review from Allrecipes USA and Canada)