Preheat oven to 400°.
Sprinkle sugar on bottom of well-greased 9" layer pan; cover with nuts.
Pour topping over nuts.
Dip biscuits in butter; arrange in pan with 15 biscuits overlapping around outer edge and 5 in center.
Bake at 400° for 23-25 minutes.
Let stand 5 minutes; invert onto serving plate.
Serve warm.