Chocolate Hazelnut Blondies

Course Dessert
Cuisine American
Servings 9
Calories 352 kcal


  • 1 stick butter unsalted
  • 1/2 cup dark brown sugar packed
  • 1/2 cup light brown packed
  • 1 1/2 tsp pure vanilla extract
  • 1 large egg + 1 large yolk room temp
  • 1 cup + 2 tbs all-purpose flour
  • 3/4 tsp kosher salt
  • 1/4 tsp baking powder
  • 1/2 cup toasted hazelnuts roughly chopped
  • 3.5 oz dark chocolate bar roughly chopped
  • flakey sea salt optional garnish


  • Heat oven to 350°F
  • Lightly grease an 8x8” square baking pan and line with two strips of opposing, overlapping pieces of parchment paper. Be sure to leave a little overhang as this helps during the removal process.
  • Begin by browning the butter
  • Put the stick of butter in a skillet set over medium heat. As the butter begins to melt, swirl the pan around to help the butter cook evenly.
  • Allow the butter to cook until it begins to smell nutty, and takes on a lovely brown color
  • Immediately transfer to a small bowl and let cool.
  • Add the flour, salt, and baking powder to another small bowl and whisk to combine.
  • To a medium bowl add the warm browned butter and both sugars and whisk to combine. The mixture will look like wet sand.
  • To the same medium bowl add the egg, yolk, and vanilla extract and whisk until smooth.
  • Fold the dry ingredients into the wet until just combined.
  • Add in chopped hazelnuts and chocolate, folding just a few more times until just mixed in.
  • Pour the batter into prepared pan
  • Bake at 350° for 23-25 minutes
  • Once out of the oven, sprinkle the blondies with a bit of flakey sea salt.
  • Allow the blondies to cool in the pan for about 10-15 minutes, then transfer to a cooling rack to cool completely.


Adapted from:


Calories: 352kcalCarbohydrates: 41gProtein: 4gFat: 20gSaturated Fat: 10gCholesterol: 51mgSodium: 302mgPotassium: 194mgFiber: 2gSugar: 27gVitamin A: 348IUVitamin C: 1mgCalcium: 51mgIron: 3mg
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