Recipes go into the Test Kitchen (which publishes Cook’s Illustrated) and reappear as runway models of their former selves. Inefficiencies, widely accepted rumors of what works, weird unnecessary steps, and disproportionate ingredients are trimmed, firmly reprimanded, frisked, or tugged into place.

Their recipe for chocolate chip cookies is full of just these alterations, challenging everyone’s favorite back o’ the box recipe by Toll House. Lighter on the flour, more and darker brown sugar, higher oven temperature, one less egg white…everything focused with undivided attention upon creating the chewiest cookie possible, with flavors of toffee, butterscotch, and serious butter love hiding inside.

The result speaks for itself. In your mouth. While you debate eating three in a row.

You can get their detailed recipe to add to your repertoire (do) right here, and here’s a visual guide to the key elements.