
These aren’t your typical thick, gooey cookies. These are intentionally thin, deliberately crispy chocolate chip cookies that shatter when you break them in half, featuring caramelized edges and chocolate in every bite. Every ingredient choice—from cake flour to egg yolks only—is a calculated move toward the crispiest, most butterscotch-flavored cookie you’ve ever baked.
Do not substitute all-purpose flour; cake flour has less protein and provides the delicate crunch required for this cookie. Using only egg yolks removes the moisture that makes cookies puff up, keeping them flat and crispy. Let them bake to a deep golden brown—pale cookies will be chewy, not crispy.