From the Cook
From the Cook
From the Cook
From the Cook
1/5
Instructions
1
Preheat the oven to 350°F (177°C). Line a sheet pan with parchment paper and set aside.
2
Combine the cooled, melted butter, brown sugar, and granulated sugar in a medium mixing bowl. Whisk until the mixture is pale and thickened, 1-2 minutes. Then, mix in the egg yolk and vanilla extract until smooth.
3
Add the flour, cornstarch, baking soda, and salt. Using a rubber spatula, fold the dry ingredients into the wet ingredients until the dough is about 90% combined. Then, add the M&Ms and continue folding the dough just until everything is well-mixed and there are no more streaks of flour. Don't over-mix or the cookies will come out dense and crumbly!
4
Using a #20 cookie scoop (~3 tablespoons), divide the dough into 6 even balls of dough. Line the cookie dough balls on the prepared sheet pan about 3 inches apart. Freeze the cookie dough balls for 15 minutes, or refrigerate for 30 minutes, until the dough is well-chilled.
5
Bake the cookies for 9-11 minutes, flipping the pan halfway through, until the edges are set and the centers are still a bit under-done. Right after the cookies come out of the oven, press a few more M&Ms to the top for decoration, if desired. Let the cookies cool for 5 minutes on the sheet pan and then transfer them to a wire rack to cool completely. Enjoy!
My Calorie Intake
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Tips & Tricks (5)
- Brown Butter for Depth 🧈Brown your unsalted butter before mixing to add a rich, nutty complexity that elevates the cookie's flavor beyond standard recipes.
- Cornstarch Secret Weapon ✨The cornstarch in this recipe is crucial—it inhibits gluten development and creates that signature chewy-yet-tender texture that keeps cookies soft for days.
- Chill Your M&Ms First 🧊Refrigerate M&Ms for 30 minutes before folding into dough so they maintain their shape and vibrant color instead of melting or bleeding into the batter.
- Egg Yolk Ratio Matters 🥚Using only the egg yolk (not whole egg) reduces excess moisture and produces denser, chewier cookies with better structure that won't spread too thin.
- Underbake for Perfect Texture 🕐Pull cookies from the oven when the centers still look slightly underdone—they'll firm up as they cool, resulting in that ideal soft-centered, crispy-edged cookie.
Recipe Facts
Diet at a Glance
Vegetarian
My Calorie Intake
Smart Nutrition 
Nutrition Per Serving
Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Glycemic Analysis
Glycemic Index
Glycemic Load
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