Apparently this works too …
What settings (speed, laser power, …) you used for the toast print?
The first test was 30% which resulted in … nothing. This was 100%. The taste was kinda heavy. I think the ideal setting would be 70% or 80%. And for graphic improvement. Use industrial white toast bread.
You’re also making it carcinogenic.
Worked great on some Christmas cookies, but definitely leaves a slightly burnt flavor. Not a nice caramelized creme brûlée taste like I was hoping for.