The blondie has suffered an identity crisis for too long, dismissed as merely a brownie without chocolate. This misses the point entirely. The blondie came first, predating the chocolate version by decades, and it deserves recognition on its own considerable merits. What you're making here is essentially the filling of a butterscotch pie in bar form. Concentrate on that thought.

The secret to a proper blondie lives in the brown sugar. Dark brown, specifically, with its higher molasses content that creates those deep caramel notes. Combined with browned butter, you get a complexity that chocolate actually obscures. I've watched too many bakers reach for chocolate chips out of habit, as if naked blondies needed saving. They don't. The butterscotch flavor stands alone magnificently.

Texture matters as much as flavor here. You want dense and chewy, not cakey. This means mixing with restraint and pulling the pan from the oven while the center still wobbles slightly. The bars will set as they cool. Overbake them and you've made blonde shortbread, which is fine but not what we're after. Trust the wobble.