01 -
Preheat oven to 350°F. Line an 8×8-inch pan with aluminum foil and spray with cooking spray. Set pan aside.
02 -
In a large microwave-safe mixing bowl, melt butter for about 90 seconds. Add brown sugar and vanilla, whisk until smooth. Add flour, oats, baking soda, and salt. Stir until combined; mixture will be thick.
03 -
Add half of the mixture to the prepared pan, smoothing it into an even layer with a spatula. Reserve the remaining mixture.
04 -
Bake at 350°F for 10 minutes. While baking, prepare caramel sauce.
05 -
In a microwave-safe bowl, combine caramel squares, cream, and salt. Heat in 60-second intervals, stirring after each, until smooth, about 4–5 minutes. Alternatively, melt over medium-low heat in a saucepan, stirring frequently.
06 -
Remove pan from oven. Sprinkle chocolate evenly over the base. Pour caramel sauce over chocolate. Crumble reserved oat mixture evenly over the top. Return pan to oven and bake for 15–18 minutes, until edges are lightly browned and center is bubbling.
07 -
Allow bars to cool completely in the pan, giving the caramel time to firm up (up to 4 hours or overnight). For quicker results, refrigerate with foil over the pan. Slice and serve when fully set.