Preheat the oven to 350F.
Using a mixer, mix the butter, sugars, and peanut butter together until combined well.
Add egg, milk and vanilla together until combined.
Add in the flour, soda, and salt in and mix until just combined.
Fold in chocolate chips of choice and some of the snicker bar bits, save some for the tops if you desire.
Using an ice cream scoop, scoop the dough onto ungreased cookie sheets. (6 per sheet, these will be very large, thick cookies!)
Use your hand and slightly flatten each scoop of dough or use a fork for criss-cross pattern.
Cook for 12-16 minutes.
Remove cookies from oven and cool on baking sheet 2-3 minutes before placing on cooling rack, so they set up.
While they are cooling on baking sheet, add some Snicker candy bits on top of the cookies.
Makes 18 cookies.