01 -
Grease a 9-inch square pan or line with parchment paper, leaving an overhang for easy removal.
02 -
Melt butter in a large saucepan over medium heat. Stir in brown sugar, vanilla, and salt until dissolved. Fold in the oats and cook over low heat for 2 to 3 minutes until well coated.
03 -
Press half of the oat mixture firmly into the bottom of the prepared pan. Reserve the remaining half for the topping.
04 -
In a small saucepan over low heat, stir chocolate chips and peanut butter together until completely smooth. Pour over the oat base and spread into an even layer.
05 -
Crumble the reserved oat mixture over the chocolate layer. Press down gently so it adheres without sinking into the filling.
06 -
Cover and refrigerate for 2 to 3 hours until firm. Let sit at room temperature for 10 minutes, then cut into 16 bars.