Preheat the oven to 375 degrees and lightly spray a 9×13 pan. In your electric mixer with a paddle attachment, beat the butter, sugar and vanilla for 1 minute until creamy. Add the flour and peanuts and mix just until incorporated. Press the dough evenly into the prepared pan and bake for 20 minutes until the crust in golden brown. Allow to cool for 10 minutes.

To make the filling, whisk in a medium bowl the eggs, sugar, corn syrup, butter, vanilla and salt until combined. Cover the top of the baked crust with an even layer of Snickers slices, leaving about 1/4″ between slices. Pour the filling mixture over the crust and bake for 35 – 40 minutes, or until set. The filling should not wiggle when you shake the pan. Cool for 30 minutes.

Spread the peanut butter in an even layer on top of the filling. Sprinkle on the chopped peanuts in an even layer. Melt the chocolate chips in the microwave for 30 seconds. Stir then microwave for another 30 seconds. Drizzle the top with chocolate and refrigerate until completely cold, about 2 hours.