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Banana Bread Snack Cake

Banana bread snack cake with a dense, moist crumb baked in an 8x8 pan and topped with a brown butter cream cheese–style frosting swirl. Easy one-bowl banana cake that’s golden on the edges and frosted only after fully cooling.
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Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 16 servings
Course: Dessert
Cuisine: American
Calories: 310
Ingredients Equipment Method Notes

Ingredients
  

Banana cake
  • 2 Bananas ripe, mashed
  • 0.5 cup butter melted
  • 0.75 cup sugar
  • 2 eggs large
  • 1 tsp vanilla extract
  • 1 cup all-purpose flour
  • 0.5 tsp baking soda
  • 0.5 tsp cinnamon
  • 0.25 tsp salt
Brown butter frosting
  • 0.25 cup butter browned
  • 1.5 cup powdered sugar
  • 2 tbsp heavy cream
  • 0.5 tsp vanilla extract

Equipment

  • 1 sheet pan
  • 1 saucepan

Method
 

Bake the banana snack cake
  1. Preheat the oven to 350°F and grease an 8x8 square pan, leaving a thin, even coat. Visual cue: the pan should look slick and ready for batter.
  2. Whisk melted butter, sugar, eggs, vanilla extract, and mashed bananas until smooth, with no streaks of egg visible. Visual cue: batter should look glossy and fully combined.
  3. Fold in all-purpose flour, baking soda, cinnamon, and salt until just combined, stopping as soon as no dry flour remains. Visual cue: a thick batter with streak-free color.
  4. Pour the batter into the prepared 8x8 pan and level the top with a quick shake. Visual cue: batter fills corners evenly.
  5. Bake at 350°F for 25–30 minutes until the top is golden and a toothpick comes out clean. Visual cue: edges pull slightly away and the center looks set.
Make brown butter frosting and finish
  1. Brown the butter in a saucepan until golden and nutty, swirling as it cooks. Visual cue: butter solids turn amber and smell toasted.
  2. Cool the browned butter for 5 minutes, then whisk in powdered sugar, heavy cream, and vanilla extract until smooth. Visual cue: frosting should be pourable and glossy.
  3. Frost the completely cooled cake in swoops and spread to the edges. Visual cue: waves sit on top without soaking in.
  4. Slice into squares to serve. Visual cue: clean slices show a moist, dense banana crumb.

Notes

For the cleanest texture, mix dry ingredients in only until you no longer see flour, and avoid over-stirring once the batter thickens. Store covered in the refrigerator up to 4 days; freeze unfrosted cake squares up to 2 months (thaw overnight, then frost). For a dairy-light option, use cream in the frosting with an equal amount of full-fat coconut cream for a similar silky consistency.