I hope this is the right place to post this, i was not sure.
I am making a few cupcakes for my sons birthday. and he really wants Oh henry flavor so i was thinking could i make a basic chocolate and add small chunks of a oh henry bar?? would i need to change anything to the recipe? I will be topping them with fondant accents for lego stuff. Is the possible?

Can anyone help with this?

I have made a snickers cupcake and just made my usual chocolate cake recipe and added a mini snickers bar at the bottom of the cupcake. No need to adjust the recipe. HTH

I'm not familar with Oh Henery but from your post I gathered it's a candy bar. If so I would probably do a test run of simply adding the candy to the cake mix maybe after you already have them in the pans so that each cupcake will get some.

I will test those out, And yes it is a Chocolate bar, I am from Canada and forget that not all the chocolate bars are in every country! Thanks