The Blondie - today it's the brownies' poor cousin. But it wasn't always that way. Blondies and Brownies share a history that is intertwined in ways that most of us have forgotten.
The original Brownies recipes didn't have chocolate... they were called brownies, but by the standard of today they would be blondies. When chocolate became widely available, and people started to crave it, the recipes branched off in different directions.