Peanut Butter Pretzel Bites

1 C chunky peanut butter
1 C confectioners' sugar
1 T butter, softened
1 C crushed pretzels
1 C chocolate chips

Line a rimmed baking sheet with wax paper. In a medium bowl, stir together peanut butter, confectioners' sugar, butter, and pretzels. Roll into one-inch balls and place on prepared baking sheet. Freeze 30 minutes, or until firm. In a small microwaveable bowl, microwave chocolate chips at 30 second intervals, stirring until chocolate is melted and smooth. Place chocolate in a resealable plastic bag, snip off corner with scissors, and drizzle over pretzel bites. Refrigerate until set.