This is another recipe that I copied out of a magazine years ago.
6 C mashed Sweet PotatoCrumb Topping:
1/2 C Brown SugarPeel and cut up the sweet potatoes (about 3 extra large ones will do it), then steam until tender, 15-20 minutes. In a large mixer bowl beat sweet potato, syrup, salt, eggs, butter, milk, and vanilla. Mix until smooth. Place in a 9x12 pan.
In a blender crumb the pecans, then add sugar and flour. Pour out into bowl and mix in the 3 T butter until crumbly. Sprinkle over top of potatoes.
Bake @ 350 degrees F. for 35 minutes. Bake 45 minutes if made ahead and chilled.