Combine flour, baking powder and salt; cut in shortening. Add milk; stir with fork just until dough leaves sides of bowl. Roll dough out, on lightly floured surface, into a 1/4 inch thick rectangle. Brush top with butter. Combine cinnamon and sugar; sprinkle evenly over dough. Roll up, starting on long side. Cut into 1/2 inch thick rounds. Place rounds, with sides just touching, in greased 9" round pan.
Bake at 425'F for 18-20 minutes or until golden brown. Remove from oven and drizzle with glaze, serve warm.
1 cup powdered sugar
2-3 tablespoon hot milk
1/4 tsp. vanilla
Combine all ingredients and beat until smooth.