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mamagourmand.com
By mamagourmand.com

Legendary Gluten-Free Banana Bars with Frosting

6 steps
Prep:5minCook:20min
You know that feeling when you make a GF treat and everyone asks for the recipe, gluten-free or not? Be prepared when you serve up the world's best frosted banana bars made with all purpose gluten-free flour. These homemade snack bars a legendary mash up of banana bread and banana sheet cake, slathered in a gooey brown butter frosting and ready in only 30 minutes!
Updated at: Wed, 11 Feb 2026 00:04:48 GMT

Nutrition balance score

Unbalanced
Glycemic Index
69
High
Glycemic Load
25
High

Nutrition per serving

Calories219.2 kcal (11%)
Total Fat9.2 g (13%)
Carbs36.1 g (14%)
Sugars26.3 g (29%)
Protein1.4 g (3%)
Sodium69.8 mg (3%)
Fiber0.8 g (3%)
% Daily Values based on a 2,000 calorie diet

Instructions

Step 1
Preheat oven to 350°F. Grease a 15X10 jellyroll baking pan (see recipe notes for 9x13 pan).
Step 2
In a large bowl, cream together the softened butter, sugar, and brown sugar until light and fluffy, about 3-5 minutes. Beat in the eggs, mashed bananas and vanilla until well combined.
Step 3
Add in flour, baking soda and salt. Mix well into the mixture.
Step 4
Pour the batter into prepared baking pan and smooth evenly. Bake for 20-25 minutes, rotating pan halfway through baking. The bars are done when toothpick inserted in middle comes out clean. Meanwhile, start the frosting.

Brown Butter Frosting

Step 5
As soon as bars come out of oven, or a little before, begin the frosting. In a medium saucepan melt the butter. Once the butter is fully melted watch carefully and stir occasionally so butter doesn't burn. First the butter will foam, then the milk solids will start to settle at the bottom. Watch for the milk solids to turn from white to golden brown. Once that happens, immediately remove from heat.
Step 6
Whisk in 1 cup powdered sugar, salt, and milk. Stir in the remaining powdered sugar. Add more milk if necessary for a thinner consistency. Immediately pour and gently spread on warm bars using an offset spatula. Cool slightly before slicing and serving.
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