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Chef Kate’s Goop Blondies

Blondies from Goop
Servings 16


  • 8 tablespoons unsalted butter room temperature (114 grams)
  • 1/4 cup plus 2 tablespoons granulated cane sugar 72 grams
  • 1/4 cup plus 2 tablespoons dark brown sugar firmly packed (80 grams)
  • 1 large egg
  • 1 teaspoon vanilla extract 5 ml
  • 1 cup plus 2 tablespoons all purpose flour 155 grams
  • 1/4 teaspoon salt
  • 1/4 teaspoon baking soda
  • About 1/2 cup toasted walnuts coarsely chopped or use 1/2 cup coconut
  • About 1/2 cup semi-sweet chocolate chips or use ½ cup peanut butter chips
  • About 1/2 cup mini marshmallows


  • Preheat to 350 degrees F. Grease an 8 inch metal pan or line with foil and spray with cooking spray.
  • Mix dry ingredients in a bowl; Set aside.
  • Cream butter and sugars in a mixing bowl, using high speed of an electric mixer; beat in the egg and vanilla, beating for about 30 seconds or until thoroughly mixed. With a mixing spoon, stir in the flour in 3 parts, being careful not to over mix. When flour mixture is almost incorporated, add the walnuts, chips and marshmallows and continue stirring until all flour is absorbed.
  • Spread evenly in the prepared pan and bake for 25 minutes or until set.
  • Makes 16 bars