10 Mins. prep.
15-20 mins. baking
Makes 12 muffins
Preheat oven to 400. Grease 12 standard size muffin cups or line with paper liners.
Mix together flour, baking powder, baking soda, and salt.
Beat butter at medium speed until light and fluffy. Beat in maple syrup in a slow and steady stream. Beat in sour cream and egg until blended.
At low speed, beat flour mixture into butter mixture, 1/2 cup at a time, until dry ingredients are just moistened. (Do not overmix.) Stir in nuts. Spoon batter into prepared pan, filling cups 2/3s full.
Bake muffins until tops are firm and golden, 15-20 mins. Transfer pan to wire rack to cool slightly. Turn muffins out onto rack to cool completely.
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