MAKES ABOUT 2 DOZEN
The beauty of making classic Toll House cookies is discovering how malleable the recipe can be. Once I'd learned that layering sheets of butter into dough makes puff pastry irresistibly flaky and rich, I resolved to create a chocolate chip cookie with equal textural appeal. I tried layering pieces of chocolate into cookie dough in a similar style, and I was delighted with the results: crisp around the edges, moist and tender inside, and so marbled that every bite contained the consummate balance of sweet dough, melting bittersweet chocolate, and crystalline salt.