Brown Butter Blondies

4.34 from 3 votes
Prep Time 5 minutes
Cook Time 35 minutes
Print Review
Chewy Brown Butter Blondies loaded with (optional) nuts and toffee!


  • 1 cup unsalted butter cut into Tablespoon-sized pieces 226g
  • 1 cup light brown sugar tightly packed 200g
  • 3/4 cup sugar 150g
  • 2 eggs + 1 egg yolk room temperature preferred
  • 1 teaspoon vanilla extract
  • 2 cups all-purpose flour 250g
  • 2 teaspoons cornstarch
  • 1 /2 teaspoon baking powder
  • 1 teaspoon salt
  • 2/3 cup chopped walnuts optional
  • 1/2 cup toffee bits optional


  1. Preheat oven to 350F (175C). Line a 9x9 metal baking pan* with parchment paper or lightly grease and flour.
  2. Place butter in a medium-sized saucepan and cook over medium heat until melted. Once melted, turn up heat just a notch above medium and continue to cook, stirring constantly as it pops and sizzles. Once the popping slows and the butter begins to turn brown, remove from heat and pour into a large heatproof bowl.
  3. Allow browned butter to cool for at least 20 minutes before proceeding.
  4. Once butter has cooled, add sugars and stir well.

Recipe Notes

*This recipe will also work in a 9x13 metal pan, it will only need to bake about 18-20 minutes. This recipe will work in a glass pan, but the baking time will be longer.

Nutrition Facts
Brown Butter Blondies
Amount Per Serving
Calories 2065 Calories from Fat 495
% Daily Value*
Fat 55g85%
Saturated Fat 6g30%
Cholesterol 6mg2%
Sodium 2346mg98%
Potassium 1015mg29%
Carbohydrates 361g120%
Fiber 12g48%
Sugar 157g174%
Protein 38g76%
Vitamin A 70IU1%
Vitamin C 1mg1%
Calcium 287mg29%
Iron 14.2mg79%
* Percent Daily Values are based on a 2000 calorie diet.