Banana bread bars...
an oldie but goodie. I made some for a family birthday gathering and got great reviews. It's the brown butter that adds that extra flavor.
Found online everywhere, lol. 
Banana Bread Bars Total Time: 40 mins; 15 Servings
Bars
1 1⁄2 cups sugar
1 cup sour cream
1⁄2 cup butter, softened
2 eggs
3 -4 bananas, mashed
2 teaspoons vanilla extract
2 cups all-purpose flour
1 teaspoon baking soda
3⁄4 teaspoon salt
1⁄2 cup walnuts, chopped (optional)
Frosting
1⁄2 cup butter
4 cups powdered sugar
1 1⁄2 teaspoons vanilla extract
3 tablespoons milk
Directions
1. Heat oven to 375°F Grease and flour 15x10-inch jelly roll pan. For the bars, in a large bowl, beat together sugar, sour cream, butter, and eggs until creamy. Blend in bananas and vanilla extract. Add flour, baking soda, salt, and blend for 1 minute. Stir in walnuts.
2. Spread batter evenly into pan. Bake 20 to 25 minutes or until golden brown.
3. Meanwhile, for frosting, heat butter in a large saucepan over medium heat until boiling. Let the butter turn a delicate brown and remove from heat immediately.
4. Add powdered sugar, vanilla extract and milk. Whisk together until smooth (it should be thicker than a glaze but thinner than frosting). Using a spatula, spread the brown butter frosting over the warm bars (the frosting will be easier to spread while the bars are still warm).
I ended up adding a little more milk to thin the frosting a bit and I had a little frosting leftover.
= new reply since forum marked as read
I think they would be very good with pecans.
Because of the frosting, these bars are very sweet compared to plain banana bread. But they are less dense. I hope your family likes them! 
