Line a baking sheet with parchment paper.
In a large bowl, cream together peanut butter and softened butter until smooth.
Stir in the vanilla extract.
Gradually add the confectioners' sugar until a stiff dough forms.
Scoop tablespoons of the dough and shape them into egg forms, placing them on the prepared baking sheet.
Refrigerate the shaped eggs for at least 1 hour until firm.
Melt the semi-sweet chocolate chips and vegetable shortening in a double boiler over low heat, stirring until smooth.
Using a fork, dip each chilled egg into the melted chocolate, allowing the excess to drip off.
Return the chocolate-coated eggs to the parchment paper and refrigerate for 30 minutes until the coating is fully set.