Blondies · Brown Butter

Brown Butter Chocolate Chip Blondies

Chewy, butterscotch-y bars with toasty brown butter, chocolate chips and pecans. One saucepan and one bowl make a whole 9x13 pan, perfect for bake sales and potlucks.

New, no ratings yet0 reviewsby Simmerbee Kitchen

Prep
25 min
Cook
28 min
Total
2 hr 25 min
Serves
24 bars
Level
Easy

Ingredients

  • 1 cup unsalted butter, 2 sticks (227 g)
    Swaps for unsalted butter

    Instead of butter

    • Salted butter: The same amount, with about ¼ tsp less salt per stick (½ cup) elsewhere in the recipe. Nothing noticeable once you cut the salt.
    • Plant-based butter sticks: The same amount. The closest swap.
    • Refined coconut oil: The same amount: solid when the butter is soft or cold, melted when it is melted. It is all fat, so bakes are a bit more tender and rich, with no butter flavor.

    All 4 swaps for butter

    Cooking for an allergy? Check every label.

  • 2 cups brown sugar, packed (425 g)
    Swaps for brown sugar

    Instead of brown sugar

    • White sugar + molasses: 1 cup granulated sugar + 1 tbsp molasses (light) or 2 tbsp (dark). The same as store-bought.
    • White sugar: The same amount. Crisper, paler cookies with less caramel flavor.
    • Light and dark brown sugar: The same amount, either way. Dark brown sugar tastes stronger and makes bakes a bit darker and moister.

    All 4 swaps for brown sugar

  • 2 large eggs, room temperature
    Swaps for eggs

    Instead of eggs

    • Flax egg: 1 tbsp ground flaxseed + 3 tbsp water for each egg. Binds well but gives less lift, so bakes are a little denser and flatter, with a mild nutty taste and brown flecks.
    • Chia egg: 1 tbsp chia seeds + 3 tbsp water for each egg. Works like a flax egg: good binding, little lift, slightly denser crumb.
    • Unsweetened applesauce: ¼ cup for each egg. Moister and denser, with a soft, slightly gummy crumb if you swap more than one egg.

    All 5 swaps for eggs

    Cooking for an allergy? Check every label.

  • 1 tbsp vanilla extract
    Swaps for vanilla extract

    Instead of vanilla extract

    • Vanilla bean paste: The same amount. Stronger, with visible vanilla seeds.
    • Vanilla bean: The seeds of 1 bean for each 1 tbsp extract. A deeper, floral flavor and visible seeds.
    • Alcohol-free vanilla: The same amount. Made with glycerin; a slightly milder taste.

    All 5 swaps for vanilla extract

  • 2 cups all-purpose flour, spooned and leveled (250 g)
    Swaps for all-purpose flour

    Instead of all-purpose flour

    • Gluten-free 1:1 baking flour: The same amount, a blend that includes xanthan gum. A little grittier and more crumbly, browns faster and dries out sooner.
    • Bread flour: The same amount. More gluten: chewier cookies and bread, tougher cakes.
    • Whole wheat flour: Up to half of the flour. Nuttier, darker and denser.

    All 4 swaps for all-purpose flour

    Cooking for an allergy? Check every label.

  • 1 tsp baking powder
    Swaps for baking powder

    Instead of baking powder

    • Baking soda + cream of tartar: ¼ tsp baking soda + ½ tsp cream of tartar for each 1 tsp baking powder. Rises the same if you don't let the batter sit.
    • Baking soda + buttermilk or yogurt: ¼ tsp baking soda for each 1 tsp baking powder, and swap ½ cup of the recipe's milk for buttermilk or thinned yogurt. Good rise with a light tang.
    • Self-rising flour: Use it for the flour and leave out the baking powder and salt. Each cup has about 1½ tsp baking powder and ¼ tsp salt built in, so it only fits recipes close to that ratio.

    More for baking powder

  • ¾ tsp kosher salt
    Swaps for kosher salt

    Instead of salt

    • Table salt or fine sea salt: About half as much as Diamond Crystal kosher, about ¾ as much as Morton kosher. The same saltiness when measured this way.
    • Salt by weight: 1 tsp is about 6 grams of table salt, 5 grams of Morton kosher, 3 grams of Diamond Crystal kosher. The most reliable way to swap, especially in baking and brines.

    More for salt

  • 1 cup semisweet chocolate chips, 170 g
    Swaps for semisweet chocolate chips

    Instead of chocolate and chocolate chips

    • Semisweet and bittersweet: The same amount, either way. Bittersweet is less sweet and more intense; semisweet is milder and sweeter.
    • Chopped bar chocolate for chips: The same weight (a 12 oz bag of chips is about 2 cups). Melty puddles and streaks instead of neat chips.
    • Chips for bar chocolate when melting: The same weight. Chips melt thicker and less smoothly, so ganache and glazes are a bit stiffer.

    All 4 swaps for chocolate and chocolate chips

  • ½ cup pecans, chopped (optional) ≈ 55 g
    Swaps for pecans

    Instead of nuts

    • Another nut: The same amount. Pecans are sweeter and softer, walnuts slightly bitter, almonds firmer and milder.
    • Toasted pumpkin or sunflower seeds: The same amount. Smaller and crunchier, with an earthy taste.
    • Leave them out, or use chocolate chips or toasted oats: The same amount (or none). Leaving nuts out doesn't change how a batter bakes.

    More for nuts

    Cooking for an allergy? Check every label.

Different pan? Written for 9x13-inch rectangle; rescale the amounts for an 8x8, 9x13, round, loaf or sheet pan.

Cooking for a crowd? Pans, timing and salt for 12 to 50.

Missing something? Tap Swaps next to an ingredient, or see all substitutions.

Steps

Kid helper. A child can do steps 5, 6, 7 and 8: no knife, no heat. Steps marked “Grown-up” use a knife or heat. Cooking with kids

  1. Heat the oven to 350°F (175°C).
    Grease (how to grease and flour a pan) Grease and flour a pan Coat a pan with fat (and sometimes flour) so baked goods release cleanly. 1. Rub a thin layer of soft butter or shortening into every corner with a paper towel, or use baking spray.2. For cakes, add a spoonful of flour, tilt and tap the pan until it is coated.3. Turn the pan over and tap out the extra flour.4. For chocolate cakes, use cocoa instead of flour so there is no white film. Done when: Every surface, corners included, is lightly coated with no bare spots or thick clumps. How to grease and flour a baking pan: mistakes to avoid
    a 9x13-inch pan and
    line (how to line a pan) Line a pan Cover the bottom (and sometimes sides) of a pan with parchment or foil so food doesn't stick and lifts out easily. 1. For a sheet pan, tear parchment the size of the pan and lay it flat.2. For a round cake pan, trace the bottom on parchment, cut the circle out and press it in.3. For brownies and bars, leave two long sides hanging over to make handles (a "sling").4. A little grease under the paper holds it in place. Done when: The paper lies flat with no folds where the batter could run under it. How to line a baking pan with parchment: mistakes to avoid
    it with parchment, leaving overhang on the long sides.
    350°FGrown-up: heat
  2. Melt the butter in a light-colored saucepan over medium heat. Keep cooking, swirling the pan, until it foams, smells nutty and the bits on the bottom turn golden brown.
    ⏱ Brown butter: 6 minGrown-up: heat
  3. Pour the
    brown butter (how to brown butter) Brown butter Cook butter past melting until the milk solids toast and it smells nutty. 1. Cut the butter into pieces and melt it in a light-colored pan, so you can see the color, over medium heat.2. Swirl the pan as it foams and crackles.3. Watch the bottom: tiny brown flecks appear and it smells like toasted nuts.4. Pour it into a heatproof bowl right away, scraping in the brown bits. Done when: The butter is amber, the flecks are brown (not black) and it smells nutty, after 5 to 8 minutes. Safety: Browned butter is far hotter than boiling water; let it cool before you mix it with eggs or taste it.How to brown butter: mistakes to avoid
    and all the browned bits into a large bowl right away so it stops cooking.
    Grown-up: heat
  4. Whisk (how to whisk) Whisk Beat ingredients with a whisk to mix them smoothly or to add air. 1. Use a bowl big enough to whisk without splashing; set it on a damp towel to stop it spinning.2. Hold the whisk loosely and move it in quick circles or side to side, touching the bottom.3. For lumpy mixtures, add liquid a little at a time and whisk after each.4. For sauces on the stove, keep the whisk moving across the whole bottom of the pan. Done when: The mixture is even with no lumps or streaks of egg. How to whisk: mistakes to avoid
    the brown sugar into the butter until smooth, then let it cool.
    ⏱ Cool butter: 10 minGrown-up: heat
  5. Whisk in the eggs one at a time, then the vanilla.
    Kid step
  6. Add the flour, baking powder and salt and
    fold (how to fold) Fold Combine a light mixture (whipped cream, beaten whites) or chunky add-ins into a batter gently, so it stays airy. 1. Put the lighter mixture on top of the heavier one, or add the flour or chips.2. Cut a rubber spatula straight down through the middle to the bottom of the bowl.3. Sweep it across the bottom and up the side, then turn it over on top.4. Turn the bowl a quarter turn and repeat.5. Stop as soon as no streaks remain. Done when: There are no dry streaks or white blobs, and the mixture still looks light and puffy. Safety: Batters with raw eggs or flour aren't safe to eat raw.How to fold ingredients into a batter: mistakes to avoid
    with a spatula until just combined.
    Kid step
  7. Fold in the chocolate chips and pecans, if using.
    Kid step
  8. Spread the batter evenly in the pan. It will be thick, so use the spatula to push it into the corners.
    Kid step
  9. Bake until the edges are golden and pulling away from the pan and
    a toothpick (how to toothpick test) Toothpick test A quick way to tell if a cake, quick bread or brownie is baked through. 1. Near the end of the baking time, open the oven and pull out the rack.2. Poke a toothpick or thin skewer into the center (the last place to set).3. Pull it straight out and look at it.4. If wet batter clings, bake a few minutes more and test again. Done when: Clean, or with a few moist crumbs for brownies and fudgy cakes. Wet, shiny batter means not yet. How to test a cake with a toothpick: mistakes to avoid
    in the center comes out with moist crumbs.
    350°F⏱ Bake: 28 minGrown-up: heat
  10. Cool completely in the pan on a rack before cutting into 24 bars.
    ⏱ Cool: 1 hr 30 minGrown-up: knife, heat

Tap an underlined word for how to do it, or see all techniques.

Tips

  • Brown butter goes from golden to burnt quickly. Once it smells nutty and the specks are the color of toast, pour it out.
  • Underbaking slightly keeps them chewy. They firm up as they cool.

Storage

Covered at room temperature up to 4 days.

Make ahead

Freeze the cooled, cut bars in a single layer, then bag them up to 3 months.

Quick answers

Can I freeze it?

Freeze the cooled, cut bars in a single layer, then bag them up to 3 months.

What can I swap?

Answered from this recipe's own storage, make-ahead and swap notes.

Estimated nutrition per serving

Calories
210
Protein
2 g
Carbohydrates
30 g
Fiber
<1 g
Sugars
21 g
Fat
10 g
Saturated fat
6 g
Sodium
90 mg

Whole recipe, 24 servings: about 5,150 calories.

Estimate from USDA FoodData Central; not medical or dietary advice. Based on 8 of 8 ingredients.

How we estimate

We add up USDA FoodData Central values for each measured ingredient as written and divide by the recipe's 24 servings, so changing the servings or units here doesn't change a serving. Brands, swaps, trimming and cooking all change the real numbers.

Not counted: pecans (optional).

Estimated cost

About $0.25 a serving

About $6.25 for the recipe as written (24 servings).

Estimate; prices vary by store and region. U.S. average prices for September 2026 from BLS Average Price Data and USDA ERS Purchase to Plate prices updated with the BLS Consumer Price Index. Priced: 5 of 8 ingredients, 98% by weight.

How we estimate

Each measured ingredient is weighed as in the nutrition estimate and priced at the U.S. average: BLS's average price where BLS publishes one, else USDA ERS's Purchase to Plate price for 2017-18 raised to September 2026 with the CPI for that food group. Whole packages, store brands, sales and regions all change the real cost: treat it as a ballpark.

  • semisweet chocolate chips $2.10 ERS
  • unsalted butter $2.00 BLS
  • brown sugar $1.50 ERS
  • eggs $0.40 BLS
  • all-purpose flour $0.30 BLS

Not priced (no official average price we can match, so not in the total): vanilla extract, baking powder, kosher salt.

Not counted: pecans (optional, or to taste).

More dishes for less: cheap eats.

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Cleanup score 3/5 (some cleanup): 3 things to wash, saucepan, 9x13 pan, mixing bowl.

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