gulp-multiple-dest

gistfile1.txt

var gulp = require("gulp");
var minify = require("gulp-minify-css");
 
 gulp.task("css", function () {
  return gulp.src("./style/style.css")
    .pipe(minify())
    .pipe(dest("./output/style"))
    .pipe(dest("./anotherOutput/style));
 });