Step 1

Preheat the oven to 350°F. Spray a 13-by-9-inch baking pan with baking spray with flour, line it with parchment paper leaving at least a 1-inch overhang, and spray again.

Step 2

In a large bowl, whisk together the flour, oats, brown sugar, and baking soda. Add the butter and vanilla, and fold to combine.

Step 3

Press half of the mixture in an even layer in the prepared pan. Bake until just set, about 10 minutes.

Step 4

Heat the caramel sauce in the microwave until pourable, according to the package directions.

Step 5

Sprinkle the crust with the chocolate chips and pecans. Pour the caramel in as even a layer as possible over the chocolate and nuts. Crumble the remaining oat mixture evenly over top.

Step 6

Bake until lightly golden, 20 to 25 minutes.

Step 7

Allow the bars to cool completely, at least 1 hour. Slice into 24 pieces and sprinkle with flaky sea salt.