Heat oven to 375. In small bowl, combine sugar,flour and cinnamon. Separate dough into 16 triangles. Dip 1 marshmallow in margarine; roll in sugar mixture. Place marshmallow on wide end of triangle. Roll up starting at wide end of triangle and roll to opposite point. Completely cover marshmallow with dough;firmly pinch edges to seal. Dip 1 end in remaining margarine;place margarine side down in ungreased large muffin cup or 6oz custard cup. Repeat with remaining marshmallow.
Bake at 375 for 12 to 15 minutes or until golden brown. (Place foil or cookie sheet on rack below muffin cups to guard against spills) Immediately remove from muffin cups; cool on wire racks over waxed paper. In small bowl, blend powdered sugar,vanilla and enough milk for desired drizzling consistency. Drizzle over warm rolls. Sprinkle with nuts.