1 ½ cups peanut butter
6 cups powdered sugar
1 cup (2 sticks) butter, softened
½ teaspoon vanilla extract
4 cups semisweet chocolate chips
¼ cup shortening
1. Line cookie sheet with wax paper. Mix together butter, peanut butter, sugar, and vanilla with a wooden spoon in a large bowl.
2. Roll dough into 1-inch balls. Set them on prepared cookie sheet and insert toothpick into each ball. Chill in freezer until hard, approximately 30 minutes.
3. Melt chocolate chips and shortening over medium-high heat. Remove the pan from heat. Dip balls in chocolate and place back on cookie sheet. Refrigerate until chocolate is set, approximately 2 hours.
Store in airtight container in refrigerator.