Add popped popcorn to a large baggie and crush with a rolling pin. Remove any unpopped or burnt kernels.
Cream brown sugar and butter/shortening until light and fluffy, about 3 minutes. Beat in egg and vanilla. In a separate bowl, stir baking soda, baking powder, flour and salt together with a fork. Gradually add into creamed mixture and beat on low until well blended. Stir in chocolate chips and popcorn. Drop by tablespoons onto a greased cookie sheet about 2 inches apart Bake approximately 11 to 13 minutes or until golden. Do not overbake.
Remove to a cooling rack and store in an airtight container after completely cool.