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Nutella Swirled Banana Blondies Recipe

4.9 from 90 reviews

Delight in these Nutella Swirled Banana Blondies, a luscious twist on classic blondies featuring mashed ripe banana, chunks of milk chocolate, chopped hazelnuts, and generous swirls of creamy Nutella. Perfectly moist and sweet with a slight crunch, these blondies are an irresistible treat for any chocolate and nut lover.

Ingredients

Scale

Chocolate and Butter Mixture

  • 200g White Chocolate
  • 175g Unsalted Butter

Wet Ingredients

  • 200g Caster Sugar
  • 2 Medium Eggs
  • 100150g Ripe Banana, mashed (about 1 large banana)
  • 30g Golden Syrup

Dry Ingredients

  • 280g Plain Flour
  • 20g Cornflour

Add-ins and Decoration

  • 200g Milk Chocolate, chopped
  • 100g Hazelnuts, chopped, plus extra for decoration
  • 100150g Nutella Spread (for swirling and decorating)

Instructions

  1. Preheat and Prepare Pan: Preheat your oven to Gas Mark 4 / 180ºC. Line a 9×9 inch square baking tin with parchment paper to ensure easy removal of the blondies after baking.
  2. Melt Butter and White Chocolate: Place unsalted butter and white chocolate in a microwave-safe bowl. Heat in short bursts, stirring well between each burst, until the mixture is smooth and fully melted to prevent splitting.
  3. Add Sugar: Stir the caster sugar into the melted butter and white chocolate mixture until well combined.
  4. Incorporate Wet Ingredients: Mix in the mashed ripe banana, eggs, and golden syrup until fully combined, creating a smooth batter.
  5. Add Dry Ingredients and Mix-ins: Gradually fold in the plain flour and cornflour until no flour streaks remain. Stir through chopped milk chocolate and chopped hazelnuts evenly throughout the batter.
  6. Pour and Swirl Nutella: Transfer the batter into the prepared baking tin and spread evenly. Drop spoonfuls of Nutella over the top and use a knife or skewer to gently swirl it into the batter for a marbled effect. Decorate with additional chopped hazelnuts.
  7. Bake: Bake in the preheated oven for 25-30 minutes. The blondies are done when a slight wobble remains in the center. Check doneness every 2-3 minutes after 25 minutes as baking times may vary based on your oven.
  8. Cool and Set: Allow the blondies to cool completely in the tin. For best results, refrigerate the blondies for 3-4 hours or overnight to set properly before slicing.
  9. Serve: Once chilled and firm, slice into squares and enjoy your Nutella Swirled Banana Blondies!

Notes

  • Ensure the white chocolate and butter are melted gently to avoid seizing.
  • Ripe bananas add natural sweetness and moisture — the riper, the better.
  • Swirling Nutella into the batter creates beautiful marbling and adds extra flavor.
  • Chilling the blondies after baking helps achieve clean slices and enhances flavor.
  • Store leftovers in an airtight container in the fridge for up to 4 days.

Keywords: Nutella blondies, banana blondies, chocolate hazelnut dessert, baked blondies, banana chocolate dessert