Bake the ultimate chewy chocolate chip cookies with melted butter, an extra yolk, and cornstarch for a bakery-style texture that stays soft for days.
- Melted butter limits gluten development, resulting in a tender, melt-in-your-mouth crumb rather than a cakey bite.
- An extra egg yolk introduces lecithin and fat, creating an ultra-rich, emulsified dough that bakes up incredibly chewy.
- Cornstarch interferes with the flour's protein matrix and locks in moisture, ensuring the centers remain soft for days.
I still remember the afternoon my cheap aluminum baking sheet warped in the oven with a loud, metallic *pop*, sliding half a dozen pale, doughy discs into a single, sad puddle. My wrists were sore from beating cold butter, and the cookies were a flat, greasy disappointment.
That failure changed everything.
To fix the spread, we have to look at the science of fat and sugar. Melted butter completely changes how the flour's protein matrix forms, while the high ratio of brown sugar—packed with moisture-retaining molasses—keeps the crumb incredibly soft. Adding a touch of cornstarch helps with starch gelatinization, absorbing excess moisture so the cookies bake up thick and chewy instead of spreading into thin, crispy wafers.
For the salt, I always reach for Diamond Crystal kosher salt — 1 tsp = ½ tsp table salt, because the flakes are larger and lighter.
The biggest pitfall is rushing the chilling step; warm, melted butter dough is a slick, runny mess that will melt instantly in a hot oven. Give it at least two hours in the fridge so the fats can solidify and the flour can fully hydrate, yielding a beautifully tall, caramelized cookie. If you prefer a massive, single-serving treat, you can also check out our Giant Chocolate Chip Cookies.
Your patience will be rewarded.
Chewy Chocolate Chip Cookies
Ingredients
- 2 and 1/4 cups (281g) all-purpose flour (spooned & leveled)
- 1 teaspoon baking soda
- 1 and 1/2 teaspoons cornstarch
- 1/2 teaspoon salt
- 3/4 cup (170g / 12 Tbsp) unsalted butter, melted & cooled for 5 minutes
- 3/4 cup (150g) packed light or dark brown sugar
- 1/2 cup (100g) granulated sugar
- 1 large egg + 1 egg yolk, at room temperature
- 2 teaspoons pure vanilla extract
- 1 and 1/4 cups (225g) semi-sweet chocolate chips or chocolate chunks
Directions
- Whisk the flour, baking soda, cornstarch, and salt together in a large bowl.
- In a separate medium bowl, whisk the melted and cooled butter with both the brown and white sugars until the mixture is completely smooth and free of lumps. Whisk in the whole egg, the extra egg yolk, and the vanilla extract until fully incorporated.
- Pour the wet ingredients into the dry mixture and stir with a sturdy spatula or wooden spoon until a soft, glossy dough forms. Gently fold in the chocolate chips, pressing them into the dough as much as possible.
- Cover the bowl tightly with plastic wrap and chill in the refrigerator for at least 2 hours, or up to 3 days, to allow the flour to hydrate and prevent the cookies from spreading too thin.
- Preheat your oven to 325°F (163°C) and line two large baking sheets with silicone baking mats or parchment paper. If the dough has been chilling for more than a few hours, let it sit on the counter for 15 minutes to soften slightly.
- Scoop the dough into portions—about 3 tablespoons (60g) for extra-large cookies or 2 tablespoons (50g) for medium-large cookies. Roll each portion into a ball, then gently pull and shape it into a tall cylinder to encourage upward rise during baking.
- Arrange the dough cylinders on the prepared baking sheets, leaving 3 inches of space between each cookie.
- Bake for 13 to 14 minutes, or until the outer edges are barely golden brown and set, while the centers still look soft and slightly underbaked.
- Remove from the oven and let the cookies rest on the hot baking sheet for 10 minutes to finish setting before transferring them to a wire rack to cool completely. If desired, press a few extra chocolate chips into the warm tops for a bakery-style finish.
Notes
Keep these essential tips in mind to ensure your cookies turn out perfectly soft and chewy every single time:
- Salt Conversion: This recipe is tested using Diamond Crystal kosher salt; if you are using fine table salt, reduce the amount to 1/4 teaspoon to avoid over-salting.
- The Egg Yolk Secret: The extra egg yolk adds fat and lecithin, which emulsifies the dough and keeps the crumb dense and chewy rather than cakey.
- Temperature Warning: Do not skip cooling the melted butter before adding the eggs, or you risk scrambling the eggs and melting the chocolate chips prematurely.
- Freezer Friendly: Unbaked dough balls can be frozen for up to 3 months; bake them straight from the freezer at 325°F (163°C) for an extra 1 to 2 minutes.
- Cornstarch Substitute: The cornstarch is essential for softening the gluten in the all-purpose flour, but if you are completely out, you can omit it for a slightly crisper edge.
- Add-in Variations: Keep total mix-ins to 1 and 1/4 cups; try swapping some chocolate for butterscotch chips, similar to our 1-Bowl Salted Butterscotch Blondies.
Serving Suggestions
Elevate your cookie experience by pairing these warm, chewy treats with contrasting textures and flavors:
- Serve warm alongside a cold glass of whole milk to balance the rich, buttery sweetness of the molten chocolate.
- Pair with a scoop of bitter espresso ice cream to cut through the intense caramel notes of the brown sugar.
- Top with a pinch of flaky sea salt immediately after baking to highlight the deep vanilla and chocolate flavors.
- Enjoy alongside a cup of hot black tea, which cleanses the palate between rich, chewy bites.
- If you love oats, try serving these alongside our Dark Chocolate Chunk Oatmeal Cookies for a diverse cookie platter.
Storage and Reheating
Keep these cookies in an airtight container at room temperature for up to one week. To keep them ultra-soft, slip a slice of plain white sandwich bread into the container; the cookies will absorb the moisture from the bread without losing their texture.
After 24 hours in the fridge, the baked cookies will firm up significantly due to the butter solidifying. If you prefer that fresh-from-the-oven texture, pop a cookie in the microwave for 8 to 10 seconds to melt the chocolate and soften the crumb.
For long-term storage, freeze the baked cookies in a single layer on a baking sheet before transferring them to a zip-top freezer bag for up to 3 months. Thaw at room temperature for 30 minutes, or warm them in a 300°F (149°C) oven for 5 minutes.
If you love cookie dough flavors but want a different format, you can also explore our Cookie Dough Buttercream Frosting for topping cakes and cupcakes.
Ingredient Substitutes
If you need to adapt this recipe for dietary needs or pantry limitations, try these tested swaps:
- All-Purpose Flour → 1:1 Gluten-Free Baking Flour: Swap 281g of all-purpose flour for an equal weight of Bob's Red Mill 1-to-1 Gluten-Free Baking Flour. Let the dough rest for an extra 10 minutes before shaping to allow the rice flour to absorb the liquid.
- Unsalted Butter → Salted Butter: Replace the unsalted butter with 170g of salted butter, but reduce the added salt in the recipe to 1/4 teaspoon to prevent the cookies from tasting overly salty.
- Brown Sugar → Coconut Sugar: Swap 150g of brown sugar for 150g of coconut sugar. Note that the cookies will spread slightly more and have a deeper, more caramelized flavor profile.
- Semi-Sweet Chocolate Chips → Dark Chocolate Chunks: Replace 225g of semi-sweet chips with chopped dark chocolate (70% cacao). The uneven chunks will create pools of melted chocolate throughout the dough.
- Egg Yolk → Heavy Cream: If you are out of eggs but have one on hand, replace the extra egg yolk with 1 tablespoon of heavy cream to maintain the fat content and moisture level.
There is something incredibly comforting about a warm cookie cooling on the counter, filling the kitchen with the scent of toasted sugar and vanilla. Once you master this melted-butter technique, you will never go back to creaming cold butter again.
