Combine sugar, flour and cinnamon in a small bowl.
Separate dough into 16 triangles.
Dip a marshmallow into melted butter.
Roll in sugar-cinnamon mixture.
Place marshmallow on wide end of each triangle.
Roll up, starting at shortest side of triangle, rolling to opposite point.
Completely cover marshmallow, pinching edges of dough to seal.
Dip in melted butter; place butter side down in ungreased large muffin cup.
Repeat with remaining marshmallows.