Prepare a large baking sheet lined with parchment paper.

In a saucepan, combine butter, sugars, and milk. Apply medium heat until boil. Boil for 1 minute.

Remove the saucepan from heat. Add the peanut butter, salt, and vanilla. Stir until they combine.

Add the oats. Mix thoroughly.

Scoop tablespoonfuls of the mixture and place onto the baking sheet.

Allow to cool down and harden for about 30 minutes.

Serve.