0.5cupunsalted butter, softenedsoftened to room temperature
0.5cupgranulated sugar
0.5cuplight brown sugar, packedpacked
1large egg
1tspvanilla extract
1.5cupall-purpose flour
1tspcornstarchfor extra softness
0.5tspbaking soda
0.5tspkosher salt
0.5cupmini chocolate chips
1.5cupKit Kat bars, choppedchopped into small pieces
0.25tspflaky sea saltoptional, for topping
Instructions
Preparation Steps
Preheat oven to 350°F. Line 2 baking sheets with parchment paper.
In a large bowl, beat softened butter, granulated sugar, and brown sugar until light and creamy, about 2 minutes.
Beat in the egg and vanilla until smooth, scraping the bowl as needed.
In a separate bowl, whisk together flour, cornstarch, baking soda, and kosher salt.
Add the dry ingredients to the wet ingredients and mix on low just until combined; do not overmix.
Fold in mini chocolate chips and 1.25 cups of the chopped Kit Kat, reserving 0.25 cup for topping.
Scoop dough into 1.5 tablespoon portions and place 2 inches apart on prepared sheets. Gently press a few reserved Kit Kat pieces on top of each dough ball.
Bake for 9 to 11 minutes, until edges are set and centers look slightly soft. Sprinkle lightly with flaky sea salt, if using.
Cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.
Notes
For extra flavor, brown the butter and let it cool to room temperature before using. Dough can be chilled for 30 minutes for thicker cookies.