Cake With Too Much Brown Sugar

I expect it would change the texture considerably, and brown sugar has a flavor of its own so the overall flavor would probably change as well. However, many great dishes are created due to cooking errors. I'd probably contact the recipient, confess the error, and ask how it turned out.

What I enjoy most about cooking is that it's always an experiment for me. Succeed or fail, it's best to learn all I can from the result. The lessons are usually easy to remember because I try to keep notes of what I'm doing, and for better or worse I have to eat the results. {;~)