flutter-desktop-embedding how to build exe file

First check the build options with flutter build -h

Then run flutter build windows

Then you can find the build in the following path \build\windows\x64\Release\Runner

Although it is created in the release folder it is still just a debug build.

If you flutter build or flutter run a desktop project, you're already building a .exe; that's what's being launched by flutter run. You can find it in the build directory of the project (e.g., build\windows\x64\Debug\Runner\Flutter Desktop Example.exe for the FDE example app).