in a large bowl use mixer to combine 1/2 softened butter and 1 c sugar. mix in 1 egg, 1/2 tsp vanilla and salt (each). add 1 1/2 c flour. divide into equal portions and add food coloring. Between cutting board and wax paper, roll each piece into a rectangle. Layer rectangles & roll into log. Coat outside with sprinkles and chill for 4 hours. Cut into 1/4in rounds & bake for 8-10min at 375.
