Gather your supplies
Measure the sides of the kit Kat bar, so you can make the frame the right size. It should be 2 widths, 1 width, 1 length high and the roof is a half length.
The frame looks like this on the cardboard
Tape the frame together like so
Using icing as glue, stick the kit kats onto the frame
Break off two pieces of the aero bar. One piece becomes the chimney, one the doorstep, and the large piece the door
Decorate however you like with candy and you're done!