1. Chill dough 30 to 60 minutes to reduce spreading and boost chew. Use old fashioned rolled oats for best texture and avoid overmixing after adding flour. Pull cookies when centers look slightly soft because they finish setting as they cool. Swap mix ins up to 1 cup total such as dried cranberries or butterscotch chips. Store airtight up to 5 days or freeze baked cookies up to 2 months