Preheat oven to 350° and butter an 8” or 9” square baking dish. Spray pan with a pan release such as Bakers Joy or Pam for Baking.
In a medium bowl, soften butter in the microwave. Butter should be very soft, can be somewhat melted.
To the butter add brown sugar, flour oats, pecans, cinnamon, and salt. Mix together with a spoon (or your hands) until well combined. Mixture will be crumbly.