Chewy Chocolate Chip Cookies Made with Egg Yolks

These quick and easy egg yolk chocolate chip cookies are a great way to use up leftover yolks from other recipes. They bake up crisp at the edges and soft and chewy inside. The batch is small and flexible: halve it for four cookies or double it to make a larger tray.

Why you’ll love these chocolate chip egg yolk cookies

1. They use leftover egg yolks so nothing goes to waste.
2. Extra yolks and butter create a richer, more tender cookie than a standard recipe.
3. Fast and straightforward—ready to mix and bake in minutes.
4. Easily scaled: halve for four cookies, double for 16.

This recipe is adapted from a small-batch chocolate chip cookie formula. I replaced the whole egg with two egg yolks and increased the butter and sugar slightly to preserve the ideal texture and flavor.

Ingredients

Full recipe quantities are listed in the recipe card below. Notes on key ingredients:

• All-purpose flour — the structure of these cookies relies on all-purpose flour; I don’t recommend swapping it.
• Light brown sugar — this recipe uses only light brown sugar for color and chew; substituting with granulated or dark brown will change appearance and flavor. (Half dark brown + half granulated approximates light brown.)
• Butter — salted butter adds a nice balance and extra flavor; feel free to use unsalted and add a touch more salt if preferred.
• Egg yolks — 2 large yolks (cold or room temperature).
• Vanilla extract — important for aroma and depth of flavor.
• Baking powder — this recipe uses baking powder (no baking soda).
• Sea salt flakes — optional but highly recommended as a finishing touch.
• Chocolate — use a mix of chocolate chips (dark + milk or dark + white) or chopped baking chocolate; chopped chocolate may cause a bit more spread and slightly longer cooling time.

Tip: a digital scale improves consistency—dry ingredients are often over-measured when spooned into cups.

Step-by-step instructions

1. Preheat the oven to 350°F (177°C) for convection, or 325°F (163°C) for conventional. Line baking sheets with parchment paper.
2. In a medium bowl, microwave the butter 20–30 seconds just until melted. If it becomes very hot, let it cool briefly.
3. Whisk the light brown sugar into the warm melted butter until smooth, about a minute.
4. Add the egg yolks and vanilla. Whisk vigorously for 1–2 minutes until completely smooth and emulsified.
5. Fold in the flour, fine sea salt, and baking powder until a few streaks of flour remain—do not overmix.
6. Gently fold in the chocolate until evenly distributed.
7. Portion the dough into eight equal pieces for medium cookies (about 2.25 oz / ~64 g each). Place on prepared sheets with space to spread.
8. Bake one sheet in the center of the oven for 11–13 minutes on convection (13–15 minutes conventional) until the edges are golden, the center is puffed and no longer wet.
9. Remove from the oven. If you prefer perfectly round cookies, quickly use a round cutter, cup, or mug to nudge each still-warm cookie into a circle. Be gentle to avoid tearing.
10. Let the cookies rest on the baking sheet for 5–10 minutes before transferring to a cooling rack. Sprinkle with sea salt flakes and serve warm.

How to customize these cookies

1. Make them chocolate: swap 1/4 cup of the flour for cocoa powder.
2. Swap chips for white chocolate or fold in freeze-dried fruit for a fruit-and-chocolate variation.
3. Add nuts: replace half the chips with chopped nuts for extra crunch.
4. Mix-ins: replace part of the chips with chopped sandwich cookies, peanut butter cups, marshmallows, or other favorite mix-ins for fun flavors.

Frequently Asked Questions

How to store the cookies after baking

Store cooled cookies in a sealed bag or container at room temperature for a few days. They may dry slightly over time; a quick 5–10 second warm-up in the microwave refreshes them nicely.

Thanks for reading—if you try the recipe, leave a rating or comment to let me know how they turned out.

Happy baking!

Love, B