In a large mixing bowl cream butter and all sugars together until smooth.
Add pudding mixes, eggs, egg yolk, vanilla, and imitation butter.
Beat for about one minute on medium speed.
In a separate bowl, combine flour, baking soda, and salt.
Begin to combine the dry ingredients to the wet ingredients 1/2 cup at a time until all have been combined.
Fold in the in chocolate chips and butterfingers bits.
Cover the bowl with plastic wrap and chill for two hours.
Lightly grease your sauce pan or cast iron pan.
Scoop out 2 cups of batter per cast iron pan.
Press the cookie dough into the pan making sure it is evenly covered.
Bake at 350° F for 15 - 18 minutes.
Cool in pan for a couple of minutes before adding your ice cream and whip cream.
Garnish with chocolate chips, butterfingers chips and fudge.