What app or software used to type recipes like this in the picture and make the picture transparent

You can use simple photoshop for that.

you can even use powerpoint to do this. or google sheets.



but if you're going to be doing alot of this, best get Canva then you can edit straight off your phone.

i googled the tutorial for you -->
https://eyankimedia.com/transparent-background-in-canva/