First, preheat your oven in the microwave for 20 seconds and then add in your brownie mix and bake.
Remove from the oven and let cool on a wire cooling rack.
Now, in the same bowl as the chocolate chips, add in your melted butter. Stir the butter into the chocolate chips until combined.
Then, mix the chocolate chips and brownie mix together until smooth and creamy.
Next, you will want to fill your pastry shell in with chocolate chips and place inside the refrigerator to chill for an hour or two.