Cook's Illustrated Blondies

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recipe by Food52

  • Time icon
    Total Time
  • Serves icon
  • Calories icon
based on 7 ratings

These are the blondies you'll become known for. The key to their flavor is the heavy dose of vanilla - don't skimp, and don't use artificial extract. Delicious warm or cold.

Inspired by:

recipe updated Oct 8, 2019


  • Pecan halves icon
    Pecan halves
    1 cup (101g)
  • All purpose flour icon
    All purpose flour
    1.5 cups (194g)
  • Baking powder icon
    Baking powder
    1 tsp (5g)
  • Salt icon
    about ½ tsp (3g)
  • Unsalted butter icon
    Unsalted butter
    12 tbsp (170g)
  • Light brown sugar icon
    Light brown sugar
    1.5 cups (292g)
  • Egg icon
    2 (100g)
  • Vanilla extract icon
    Vanilla extract
    4 tsp (20ml)
  • White chocolate chips icon
    White chocolate chips
    ½ cup
  • Chocolate chips icon
    Chocolate chips
    ½ cup


  • kCook icon Spatula
  • kCook icon Whisk
  • kCook icon Microwave
  • kCook icon Baking pan - 13 x 9"
  • kCook icon Large mixing bowl
  • kCook icon Small bowl
  • kCook icon Medium bowl
  • kCook icon Medium bowl
  • kCook icon Baking pan - 13 x 9"

Step preview

  1. Pre-heat oven - 175°C
  2. Add pecan halves to a clean medium bowl
  3. Transfer nuts to baking pan
  4. Bake until golden brown - 15 min, 175°C
  5. Chop medium bowl coarsely
  6. Line a clean baking pan with foil
  7. Grease
  8. Add all purpose flour, baking powder and salt to a clean medium bowl
  9. Whisk until combined
  10. Add unsalted butter to a clean small bowl
  11. Melt in microwave - low heat
  12. Get a clean large mixing bowl
  13. Transfer content of small bowl to large mixing bowl
  14. Add light brown sugar to the large mixing bowl
  15. Whisk together until combined
  16. Add egg and vanilla extract to the batter
  17. Mix until well blended
  18. Transfer dry ingredients to batter
  19. Fold until just combined
  20. Add white chocolate chips and chocolate chips to the batter
  21. Fold nuts into batter
  22. Transfer batter to baking pan
  23. Smooth
  24. Bake until light golden - 25 min, 175°C
  25. Let cool - 10 min
  26. Cut into squares
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