Cook's Illustrated's Blondies Recipe on Food52 (2024)

Make Ahead

by: Genius Recipes

July11,2021

3.5

44 Ratings

  • Prep time 30 minutes
  • Cook time 45 minutes
  • Makes 36

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Author Notes

These are the blondies you'll become known for. A few notes: The key to their flavor is the heavy dose of vanilla -- don't skimp, and don't use artificial extract. Err on the side of under-baking. These are delicious cold from the freezer or fridge (and easiest to slice that way). Adapted slightly from Cook's Illustrated (July 2005).

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What You'll Need

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Cook's Illustrated'sBlondies

Ingredients
  • 1 cuppecans or walnuts (4 ounces)
  • 1 1/2 cupsunbleached all-purpose flour (7 1/2 ounces)
  • 1 teaspoonbaking powder
  • 1/2 teaspoontable salt
  • 12 tablespoonsunsalted butter ( 1 1/2 sticks), melted and cooled
  • 1 1/2 cupspacked light brown sugar (10 1/2 ounces)
  • 2 large eggs, lightly beaten
  • 4 teaspoonsvanilla extract
  • 6 ounceswhite chocolate chips (1 cup) or chopped bar, or 3 ounces each white chocolate and semisweet chocolate chips
Directions
  1. Adjust oven rack to middle position; heat oven to 350° F. Spread nuts on large rimmed baking sheet and bake until deep golden brown, 10 to 15 minutes. Transfer nuts to cutting board to cool; chop coarsely and set aside.
  2. While nuts toast, line a 13 by 9-inch baking pan with foil, leaving enough overhang to help you lift the blondies from the pan when they're done. [Here are Cook's Illustrated's measurements, but you can just wing it: Cut 18-inch length foil and fold lengthwise to 8-inch width. Fit foil into length of 13 by 9-inch baking pan, pushing it into corners and up sides of pan; allow excess to overhang pan edges. Cut 14-inch length foil and fit into width of baking pan in same manner, perpendicular to first sheet (if using extra-wide foil, fold second sheet lengthwise to 12-inch width).] Grease foil-lined pan with butter or oil.
  3. Whisk flour, baking powder, and salt together in medium bowl; set aside.
  4. Whisk melted butter and brown sugar together in medium bowl until combined. Add eggs and vanilla and mix well. Using rubber spatula, fold dry ingredients into egg mixture until just combined; do not overmix. Fold in chocolate and nuts and turn batter into prepared pan, smoothing top with rubber spatula.
  5. Bake until top is shiny, cracked, and light golden brown, 22 to 25 minutes; do not overbake. Cool on wire rack to room temperature. Remove bars from pan by lifting foil overhang and transfer to cutting board. Cut into 2-inch squares and serve.

Tags:

  • Cookie
  • American
  • Chocolate
  • Make Ahead
  • Serves a Crowd
  • Summer
  • Memorial Day
  • Father's Day
  • Christmas
  • Mother's Day
  • Fourth of July
  • Valentine's Day

See what other Food52ers are saying.

Recipe by: Genius Recipes

Popular on Food52

102 Reviews

Anne W. July 10, 2023

I wanted to make these to serve at my Book Club after reading an article rating these as “the best blondies”. After reading the reviews on Food 52 that they were “ soup” in the middle, that the recipe was wrong and that I should use fake vanilla - I was afraid to make them. The mixing and baking process was uneventful. And they were done and perfect in 20 minutes. Nice crumb, crispy top and brown buttery edges. Very nice blondies. I am not sure what all the fuss is about?

trish M. May 30, 2023

Did not work for me. Very dense and seemed uncooked despite cooking it for extra time.

Bryan959 March 13, 2023

Recipe said 23-25 on 350… 33 minutes and still mush. Put oven on for another 10 minutes. That’ll bring it to 43. 20 more than recipe calls for. Idk why…Unless there is something wrong with my oven?!

Ann March 13, 2023

Hi,
It’s not you. It’s just a terrible recipe. Usually their recipes are very reliable but this one is a HUGE disappointment. Food 52 should take it down, IMHO.

Ashersquared February 13, 2023

Love this recipe! Easy to make and they taste delicious!

Kari.stoltzfus February 11, 2023

These are HORRIBLE. I followed the recipe to a t. Middle is soup and the outside tastes like a dry muffin. HORRIBLE!!

Ed237 January 18, 2023

These were pretty terrible, did then exactly plus followed advice from another article and the comments and they never cooked they were constantly raw

Sybil January 16, 2023

They turned out perfect at 24 minutes!💗 People having trouble with the recipe need to recheck their measurements and oven temperature…accuracy is essential.

Clementine January 10, 2023

Like others have said these turned out awful—underbaked to the point of being raw despite adding time. The actual CI recipe calls for 1.5 t of vanilla, not the 4 called for here. I threw out the first batch and remade them using the actual CI recipe and they came out perfect. Go to the source!

Ali December 16, 2022

Why did my blondies come out all liquidly? I’m so confused😣

hellobaker October 25, 2022

I followed this recipe except I subbed the white chocolate for cookies and cream bars because I didn't have anything else on hand, and it still came out tasting very vanilla-y and caramelly. For people that are worried white chocolate is too sweet, when you bake it caramelizes and has a richer flavor than its regular form. Great texture, edge pieces were crunchy but inside is still chewy and the inner pieces (which are my favorite) are soft and chewy. If you like the idea of brownies but find them to dry and like rich vanilla, caramel flavors, this is a great recipe to try. Also, I think people think the cook time needs to be longer because they aren't letting them cool to room temp and set in the fridge beforehand so let this happen unless you want dry, overbaked blondies!

Avas October 17, 2022

too cakey.

lvollm November 15, 2021

delicious recipe! the flour weight and cup measures do not agree, which could be part of the reason folks have such mixed experiences. 1.5 cups of flour should equal 6 3/8 ounces (using the King Arthur chart)...7.5 ounces is closer to 1.75 cups flour. i've never had trouble with this recipe bc i bake by weight - would be terrific if the recipe could be clarified or corrected.

Edward G. March 5, 2021

I made the recipe exactly as written and the blondies were amazing, (removed from oven at 23 minutes). I will have to reduce the amount of sugar next time if I want my wife to eat them, but the grandkids and I had no problem finishing them haha. Also, looking at the reviews, there were several people that mentioned the baking time wasn't long enough (22 to 25 minutes), and I have to imagine that they probably don't know how accurate their oven control is...like they believe every oven set to 350 degrees is exactly 350 degrees. No one making these comments said they used an oven thermometer and 'know' their oven temp was 'right on'. I think you shouldn't make a comment about temp until you check your oven. My oven used to measure 335 degrees when set to 350, so I just added 15 degrees....close enough. When it started dropping even more, a repairman repaired it, now it's +/- 3 degrees...don't mess with it anymore.

Noreen F. March 5, 2021

Exactly! I just got a new dual fuel stove and haven’t done much testing yet. Testing in the old gas oven, I discovered that the temp would drop over 50 degrees before the gas kicked on to push it back up. Needless to say, not great for baking.

Ellen L. March 3, 2021

I made these today and they are AMAZING!!! Will definitely make them for years to come!!!

Judith S. January 31, 2021

I’ve made these bars for years, a variation almost identical to Ina Garten’s recipe. I tried these today. I would say stick to Ina Garten! These are underwhelming!

A. R. December 13, 2020

This is my second attempt at a blondie, made very carefully with walnuts and a bit more chocolate and less white chocolate. At 25 minutes VERY undercooked, used a metal pan, parchment paper. I think the altitude (7297') may be to blame, will try it again with high-altitude adjustments - but not sure if I make adjustments for cookies or cakes. For us (boys 9, 12 and myself) these were crazy sweet even with a little less white sugar (another clue that it might be a high-altitude issue)

morgan October 22, 2020

I've been making this for 3 years now, I only use it as a guide and swap in and out ingredients all the time, never had a fail, always delicious and the entire pan finished by the end of the day.

lisa W. July 12, 2020

Made them just as written except about 20g less brown sugar (I would go even a bit less next time making them with white chocolate).I didn't brown the butter but certainly could. I used lovely chopped blond chocolate which gives a bit of depth and a wee bit less sweetness to the blondie. Made for the white chocolate lover in the family. Used pecans. They loved them and even though I am not a big white chocolate fan thought they were very good. Was very careful not to overbake (a bare 23 minutes). They were chewy and not at all dry or conversely underdone. Do need the cooling time to setup.

manitouanne May 8, 2020

Made these, also watched the hilarious recent IG video with the humble Amanda. I burned the pecans and had to toast another cup: quite a sacrifice. I followed the recipe precisely, used a thin metal pan and parchment for 22 minutes. Perfect. Delightful. Well received. A note: burnt butter as an ingredient would make these Burnt Butter Blondies, a variation, also delightful, but not the same thing. Make these! (Also very nice without the chocolate and nuts.)

Ellen J. May 6, 2020

I was a sceptic, too! First, I could tell from the video it was going to be a slimmer profile blondie than my usual go to recipe. This was true, but resulted in an elegant, smooth, delicious blondie! The deep toasted pecans, buttery texture, and vanilla gave it an almost praline type taste, but these were far more satisfying than any praline I’ve ever eaten! The tender crumb and the delightful fragrance were addictive. These are going to be my new go to blondie!
*Notes:
I used only dark chocolate chips (60%). For me, white chocolate would have been too sweet. I didn’t bother lining the pan, but just buttered very generously. It would probably have been slightly easier to get the blondies up with the sling, but it was an at-home quarantine recipe, so we didn’t mind a couple of imperfections. For my oven with no sling and a glass Pyrex, they were perfect at 22 minutes. I think the recipe could be upsized to make a deeper blondie, but it might lose a bit of the velvety texture.

Cook's Illustrated's Blondies Recipe on Food52 (2024)

FAQs

What's the difference between brownies and blondies? ›

Both have chewy textures. However, blondies have a much lighter and softer taste than brownies. The ingredients used in brownies are where the two recipes diverge the most. Blondies use vanilla extract and brown sugar instead of cocoa powder to get their flavor, while brownies use chocolate and cocoa.

Why are my blondies so gooey? ›

What is this? Baking time: We found that 25 – 28 minutes was perfect for a more soft and gooey center, while 30 to 35 minutes resulted in a more firm center and more golden edges. Visual cues: Blondies are done baking when the middle is slightly jiggly and shiny on top, but the edges look solidified.

Why are my blondies falling apart? ›

Blondies are supposed to be fudgy, gooey, and chewy in the middle. However, they shouldn't be falling apart. If your blondies are coming apart in your hands, it's likely for one of three reasons: You didn't aerate the eggs enough.

Why aren t my blondies baking? ›

If your blondies are raw in the middle, it's important to consider the baking temperature and the type of pan you're using. We recommend using an 8×8-inch metal square pan (ours is from USA Pans), as it provides consistent heat distribution and baking results.

Why do my blondies taste like cake? ›

Remember that we're letting them cool in the pan completely, so they will continue to cook out of the oven. Remove them from the oven when moist crumbs are still clinging to a toothpick. Why are my blondies cakey? Cakey blondies can be a result of too much liquid in the batter, over-baking, or under-stirring.

How do you know when blondies are done? ›

How do you know when blondies are done? Watch blondies closely because if you bake them too long they will be dry and not as soft. You can insert a toothpick in the center of the pan to check for doneness. If the toothpick comes out clean, they are done.

Can I put undercooked blondies back in the oven? ›

If your baked goods are undercooked:
  1. If they are only slightly undercooked, you can try returning them to the oven and baking for a few more minutes.
  2. If they are significantly undercooked, you may need to extend the baking time significantly.
Sep 14, 2023

Can I eat undercooked blondies? ›

Since you're using eggs, as long as an internal temperature reaches a minimum of 160 degrees Farenheit, you will be safe. From there, you can continue cooking until they reach whatever stage you prefer.

How do you keep blondies moist? ›

Granulated sugar - simple fine white granulated sugar keeps these brownies moist. If you reduce the sugar they will not be as fudgy.

How to tell if blondies are undercooked? ›

For a chewy, gooey-centered blondie, look for golden edges and a just-set center. It shouldn't jiggle but it may look a bit underdone and feel soft when you press it. That's perfect as the blondie will continue to cook in the pan after you take them out of the oven.

How to rescue undercooked blondies? ›

My cookies were underdone after a bake of 7 minutes. To save these cookies, I let them completely cool first. Then continue baking them at 180 degrees C for 5 minutes. After which, turn off the oven, and again leave them in and let the trapped heat continue cooking them.

Why do my blonde brownies sink in the middle? ›

Stella Parks has a surprisingly simple solution: Air. Yes, air. Or, lack thereof, rather. Parks swooped in to save the day (and future batches of blondies), acknowledging that while glass pans can make a big difference (requiring up to double the baking time), the biggest issue is usually under-aeration.

What temperature are blondies done at? ›

Doneness: Determining the right time to take cookies out of the oven is always tricky—even more so for blondies and brownies. An internal temp of 205° F (taken in the middle with an instant-read thermometer) yields a cookie bar that's fully cooked yet still perfectly moist and fudgy every single time.

What can I use instead of baking powder in blondies? ›

For every teaspoon of baking powder, you'll want to substitute in ¼ tsp of baking soda with ½ tsp of cream of tartar. If you don't have any cream of tartar, you can also substitute one teaspoon of baking powder with a mixture of ¼ tsp of baking soda plus ½ tsp of either vinegar or lemon juice.

How do you replace eggs in blondies? ›

The density and moisture are pertinent to blondies (and brownies), so it works well in this context without needing the airiness or flavor that eggs deliver. The general substitution for 1 egg is 1 tablespoon ground flaxseeds mixed with 3 tablespoons warm water.

Why are brownies called blondies? ›

The name 'blondies' comes from their light color, which contrasts with the dark color of traditional brownies.

What are the three types of brownies? ›

Brownie textures fall into three general camps… Cakey, fudgy and chewy. Cakey brownies, like the name implies, are light, moist and airy, with a slightly fluffy, cake-like interior. Fudgy brownies are moist, dense and gooey, with almost the texture of fudge, but not quite as compact.

Did blondies preceded brownies? ›

Unlike cakes, because blondies are classified as finger foods, they fall under the category of a cookie bar. And it's believed that blonde brownies actually predate chocolate brownies by about 10 years.

Should blondies be raw? ›

The whole tray shouldn't wobble – but there should still be a bit in the middle as the blondies will continue to bake somewhat in the tin. A skewer test is hard, as jam or melted chocolate may come out on it – but there shouldn't be any raw batter!

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