In a measuring cup, combine milk and maple flavoring and beat into butter mixture, alternating with flour mixture.
Beat in eggs one at a time. Mix in 1 1/2 cups chopped nuts.
Pour batter into a greased tube pan. Bake at 300 on lower 3rd rack position for 1 hour to 1 hour 15 mins. or until toothpick test comes out clean.
Cool cake in pan for 15 mins. then turn onto rack or platter. Make maple glaze by sifting powder sugar and stirring in milk and maple flavoring. I like a thicker glaze so I usually don't add too much more milk. Pour glaze over cake and garnish with nuts.