Cook noodles as directed on macaroni & cheese package, drain noodles in colander.
Microwave chili until hot.
In empty pan combine milk and dry cheese from package until smooth.
Add back the noodles and add heated chili. Serve.
Notes
You will not need the butter called for on the Mac & cheese box. There is enough grease in the chili to compensate. If box calls for a different amount of milk then use that amount.