1. In a large bowl, cream together the peanut butter, butter, granulated sugar, and brown sugar until smooth.

2. Add egg and vanilla extract, beating until combined.

3. In a separate bowl, whisk flour, baking soda, and salt. Gradually mix into the wet mixture until dough forms.

4. Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.

5. Roll dough into 1-tablespoon balls and place 2 inches apart on the sheet.

6. Bake for 9–10 minutes, until lightly golden.

7. Immediately press a truffle into the center of each warm cookie. Let cool completely.

8. Melt chocolate and use a piping bag or toothpick to draw spider legs on the sides of the truffle.

9. Dab melted chocolate on the back of each candy eye and press onto truffles.

10. Let decorations set before serving or storing.