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30 Minute Blondie Recipe

This 30 Minute Blondie Recipe is a classic that will become your family favorite bar cookie! It's filled with chewy buttery goodness and is easy to make in just a few mintues. Melted butter is key for making the chewiest Blondies! 

Course Dessert
Cuisine American
Keyword american dessert, blondies, pan cookie
Prep Time 10 minutes
Cook Time 20 minutes
Total Time 30 minutes
Servings 24
Author A Bountiful Kitchen


  • 1 cup unsalted butter, cut into tablespoons
  • 1 1/4 cups light or dark brown sugar
  • 1/2 cup white (granulated) sugar
  • 2 teaspoons vanilla
  • 2 large eggs, + 1 yolk eggs, lightly beaten
  • 2 1/2 cups All Purpose flour
  • 1 teaspoon sea salt or kosher salt
  • 1 1/2 cups total of chopped nuts or chips (butterscotch, white chocolate, coconut) SEE RECIPE NOTES**if not adding nuts or chips, add 2-3 additional tablespoons of flour
  • 2 teaspoons cornstarch


  1. Place rack in middle of oven and preheat oven to 350 degrees.  

    Line a 9x13 pan with foil or parchment and coat lightly with cooking spray.

  2. Melt butter in a heavy (4 qt pan) on stove top over medium heat. When butter is almost melted, remove from heat and stir until butter melts.

  3. Add sugars to melted butter and stir with spoon until dissolved. Add vanilla. 

  4. Add beaten eggs (2 eggs + 1 egg yolk) to butter and sugar mixture. Mix with large spoon until blended. 

  5. Add the flour, salt, nuts and/or chips (if using), and cornstarch. Fold into the butter mixture by hand until all flour has disappeared.  Make sure to add the extra flour if not using nuts or chips!

  6. Spread mixture over foil or parchment in prepared pan. Bake for 20-25 minutes or until crust forms on top and knife inserted into center of pan comes out clean or with a few moist crumbs attached. The mixture should not coat the knife. Do not over bake!  

    Remove from oven, cool completely and remove foil or parchment from pan and cut when cooled.

Recipe Notes

  • I always use unsalted butter in baking. If you only have salted butter its fine! If using salted butter, cut the amount of salt in this recipe to 1/2 teaspoon. 
  • **Important tip!** If not using nuts or chips in this recipe and the Blondies are plain, add 2-3 additional tablespoons of flour to the recipe. 
  • This recipe does not use baking soda or powder. 
  • I use my trusty 4 quart All Clad Saucepan for this recipe. It is heavy enough to melt the butter and large enough for mixing the ingredients all in one pan.