Can I debug Flask applications in IntelliJ?
Yes, you can. Just setup the proper parameters for Run script into PyCharm IDE. After that you can debug it as usual py script. In PyCharm you can evaluate any line in debug mode too.
I know how to debug a flask application in Pycharm. The question is whether this is also possible in IntelliJ.
I have my flask application debugging in Pycharm but one thing I could do in IntelliJ was evaluate expressions inline by pressing the alt + left mouse click. This isn't available in Pycharm so I wanted to run my Flask application in IntelliJ but there isn't a Flask template. 
Is it possible to add a Flask template to the Run/Debug configuration? I tried looking for a plugin but couldn't find that either.