Banana Bars
1-Preheat the oven to 350°F and line: Preheat the oven to 350°F and line a 9×13-inch baking dish with parchment paper.
2-In a large bowl, using a hand: In a large bowl, using a hand mixer, combine the butter and brown sugar.
3-On low speed, add the vanilla and: On low speed, add the vanilla and mix until incorporated.
4-Add the eggs, mixing on low until: Add the eggs, mixing on low until incorporated.
5-Add the flour and the salt, mixing: Add the flour and the salt, mixing well.
6-Fold in the mashed bananas: Fold in the mashed bananas.
7-Pour the batter into the prepared pan: Pour the batter into the prepared pan and bake for 32-36 minutes, or until the center is set.
8-Let the bars cool as you prepare: Let the bars cool as you prepare the buttercream frosting.

Salted Caramel Buttercream
9-Combine the butter, sugar, salt, and caramel: Combine the butter, sugar, salt, and caramel topping in the bowl of a stand mixer fitted with a paddle attachment.
10-Start mixing on low speed until the: Start mixing on low speed until the sugar is incorporated with the butter.
11-Increase the mixing speed to high and: Increase the mixing speed to high and beat until smooth and fluffy, about 2 minutes.
12-Adjust the consistency with milk as needed: Adjust the consistency with milk as needed.
13-Frost the banana bars with the buttercream: Frost the banana bars with the buttercream after they have cooled completely.