Whip all together and put in greased casserole dish.
Top with Streusel Topping.
Bake at 325° for 45 minutes.
PRALINE STREUSEL TOPPING:
Mix brown sugar, nuts and flour.
Cut in butter with pastry blender.
Sprinkle over top of casserole and bake at 325° for 45 minutes.
Notes
NOTE: I usually cook off about 4-6 large sweet potatoes. This usually produces closer to 5-6 cups of sweet potatoes and I go with that amount rather than 3 cups.