Brown butter walnut fudge brownies with a chocolate crackle cap made entirely from scratch? No shortcuts? No box mix? Yup! This brownie started as a ridiculous idea: a THICK crackly topped, deeply flavored, fudgy, old-school brownie with the kind of texture that several professional bakers claimed could not be achieved. After months of planning comparing methods, and careful consideration for that magical thin cookie cap, I think I might have found the one formula that actually solves the fudge to cake balance.