Cook’s Illustrated Chewy Brownies

Cook's Illustrated Chewy Brownies taste and look like from the box. They are easy to whip up and are sure to satisfy your chocolate cravings! From the Cook's Illustrated March 2010 Issue
Course Dessert
Cuisine American
Keyword chewy brownies, Cook's Illustrated brownies
Prep Time 10 minutes
Cook Time 40 minutes
Total Time 50 minutes
Calories 4693 kcal
Author Anna


  • 1/3 c unsweetened cocoa powder
  • 1/2 c + 2 Tbsp boiling water
  • 2 oz . unsweetened chocolate chopped
  • 1/4 c unsalted butter melted, 1/2 stick
  • 1/2 c + 2 Tbsp vegetable oil
  • 2 large eggs
  • 2 large egg yolks
  • 2 tsp vanilla extract
  • 2 1/2 c granulated sugar
  • 1 3/4 c flour
  • 3/4 tsp salt
  • 4 oz . semi-sweet chocolate chunks
US Customary - Metric


  1. Adjust oven rack to lowest position.
  2. Preheat oven to 350 degrees F.
  3. Line 9"x13" pan with aluminum foil. Spray with cooking spray. Set aside.
  4. In a medium mixing bowl, whisk together cocoa powder and boiling water. Add chocolate and whisk until melted.
  5. Add melted butter and oil and whisk again.
  6. Add eggs, egg yolks and vanilla and whisk until smooth.
  7. Whisk in granulated sugar until incorporated.
  8. With a rubber spatula, fold in the flour, salt and chocolate chunks.
  9. Scrape the batter into prepared pan and smooth out the top.
  10. Bake for 40 minutes. Do not over bake.
  11. Cool completely in the pan. Remove from pan and cut into squares.

Recipe Notes

It is recommended to cool brownies completely before cutting for the ultimate chewiness and cleaner cuts.

Nutrition Facts
Cook’s Illustrated Chewy Brownies
Amount Per Serving
Calories 4693 Calories from Fat 1872
% Daily Value*
Fat 208g320%
Saturated Fat 145g906%
Cholesterol 839mg280%
Sodium 1928mg84%
Potassium 1302mg37%
Carbohydrates 703g234%
Fiber 24g100%
Sugar 502g558%
Protein 52g104%
Vitamin A 2410IU48%
Calcium 236mg24%
Iron 26.8mg149%
* Percent Daily Values are based on a 2000 calorie diet.