Place frozen rolls about 2 inches apart on a large greased or parchment-lined baking sheet. (Discard frosting packets or reserve for another use.) Cover rolls with plastic wrap. Refrigerate overnight to let dough thaw and begin to rise.
Preheat oven to 350F. Generously grease twelve 2-1/2-inch muffin cups. Divide pecans evenly among muffin cups; set aside.
Cut each roll into four pieces. Dip each roll piece in melted butter, then roll in sugar. Place two dough pieces into each prepared muffin cup. Drizzle rolls with any remaining melted butter; sprinkle with remaining sugar. In a small bowl stir together ice cream topping and syrup; drizzle over rolls.
Bake in the preheated oven about 20 minutes or until rolls are golden brown. Cool in muffin cups on a wire rack for 1 minute. Invert onto a larger platter. Cool slightly. Serve warm. Makes 12 rolls.