• Preheat oven to 350 degrees. Grease 3-9 in round cake pans well.
• In a bowl, whisk together flour, baking powder and baking soda. Set aside.
• In a mixing bowl, beat butter and sugar until fluffy. Add in eggs and maple syrup.
• Gradually, add in flour mixture and buttermilk. Alternate between the two and mix well each time they are added.
• Pour batter evenly into the 3 prepared pans. Bake 10-13 minutes or until toothpick inserted comes out clean.
• Let cakes cool for 10-15 minutes before removing pans. Let them cool completely on wire rack before frosting.

FOR WALNUTS:

• In a skillet, melt butter. Add in walnuts, then, syrup. Coat walnuts well. Let them cook for 5-8 minutes to toast.
• Remove from pan and spread out evenly on a foil-line baking sheet.

FOR FROSTING:

• In a large mixing bowl, beat butter until creamy. Gradually, add in powder sugar, maple syrup and beat well.
• Start with 1/4 cup milk and gradually add in until desired consistency is reached.

TO FROST:

• Place a cake layer on cake platter. Frost with 1 cup of frosting, then, drizzle with 1 TBSP of maple syrup.
• Repeat with next layer.
• Frost top and sides of cake with remaining frosting.
• Top cake with toasted walnuts.