Preheat oven to 350 degrees F (180 degrees C). Line muffin tin with paper cups.
All-Purpose Flour (1 1/2 cups)
Baking Powder (1/2 Tbsp)
Salt (1/2 tsp)
in a bowl.
Butter (1/3 cup)
Pure Maple Syrup (1/2 cup)
for about 2 minutes.
, one at a time, beating well after each addition.
Add the flour mixture (in three increments) alternately with the
Milk (3/4 cup)
(in two increments) beginning and ending with flour.
Fold in the
Walnuts (1/2 cup)
Fill muffins cups 3/4 full. Bake for 20 minutes, then let cool on a wire rack.
Make the optional maple icing by combining
Butter (1 1/2 Tbsp)
Maple Syrup (1 1/2 Tbsp)
Milk (1 Tbsp)
in a saucepan and heat until melted.
Remove from heat and whisk in
Powdered Confectioners Sugar (1/2 cup)
Salt (1 pinch)
. Let cool before drizzling over tops of cooled muffins.