Hawaiian Macaroni Salad

2 3/4 cups macaroni noodles (uncooked)

2 1/2 cups mayo (can use light mayo)

¾ cup milk

1 Tablespoon brown sugar

1 Tablespoon garlic powder

1 1/2 teaspoon salt

2 teaspoons fresh ground black pepper

¾ cup sweet onion (minced)