01 - Line a baking sheet with parchment paper to prevent sticking and facilitate easy removal.
02 - Combine semisweet chocolate chips and unsalted butter in a microwave-safe bowl. Heat in 30-second increments, stirring after each interval, until the mixture is completely melted and smooth.
03 - Dip the tips of eight pretzel sticks into the melted chocolate for each spider. Arrange the dipped pretzel sticks on the prepared baking sheet in a starburst pattern to form the legs.
04 - Place one round chocolate candy at the center of each pretzel leg arrangement, pressing gently to secure the legs with the melted chocolate.
05 - Using a small amount of melted chocolate, adhere two candy eyes to each chocolate candy spider body.
06 - Transfer the tray to the refrigerator and allow spiders to set for 10 minutes, or until the chocolate is firm.
07 - Carefully remove spiders from the baking sheet and serve.