Cook potatoes in boiling water to
cover 15 minutes or until tender; drain and mash. Add butter and cream cheese;
beat at medium speed with and electric mixer until smooth. Stir in 1/2 cup
Cheddar cheese and next 6 ingredients; spoon into lightly buttered 11x7x1 1/2
inch baking dish.
Bake at
350° for 30 to 40 minutes, or until thoughly heated. Sprinkle with remaining
cheese; bake 5 minutes or until cheese melts.
You may prepare the night
before (except for cheese topping) and refrigerate, covered, overnight. Let
stand at room temperature 30 minutes before baking.