Directions

1. Preheat oven to 350 degrees F. Line a baking sheet with a silicon baking mat or lightly butter sheet.
2. Combine flour, cocoa powder, baking soda and salt in a medium bowl. Whisk to combine.
3. Combine butter and sugars in a medium bowl, cream together until light and fluffy. Scrape down the sides of bowl, add egg and vanilla; beat to combine.
4. With mixer on low, spoon in dry ingredients; mix to combine. Add crushed candy and chocolate bits; mix until evenly incorporated.
5. Shape dough into 1-inch balls. Place 3 inch apart on baking sheet and flatten slightly. Bake 10 to 12 minutes.
6. Remove sheet from oven and immediately use a metal spatula to neaten any edges where a piece of candy may have melted out. Let cookies cool for about 5 minutes on sheet. Transfer to a wire cooling rack to cool completely.