Pop-Tarts Cookies

1/2 cup butter
1 cup sugar
1 egg
2 squares unsweetened chocolate (2 oz), melted and cooled
3/4 cup buttermilk
1 tsp vanilla
1 3/4 cups flour
1/2 teaspoon baking soda
1/2 teaspoon salt
2 chopped s'mores Pop-Tarts
Procedure

Mix shortening, sugar, egg, and chocolate thoroughly. Stir in buttermilk and vanilla.
In a separate bowl, mix flour with baking soda and salt; mix in with wet mixture.
Fold in the Pop-Tarts pieces.
Let dough chill for at least an hour.
Heat oven to 400 F. Drop rounded teaspoonfuls of dough about 2 inches apart on a greased or parchment-lined baking sheet. Bake for 8-10 minutes, or until no imprint remains when lightly touched. Let sit for 5 minutes on the sheet before transferring to a wire rack to cool.