In a small bowl, beat the butter, almonds, sugar and vanilla until blended. Gradually add flour and cornstarch; mix well. Roll into 1-in. balls; shape into crescents and place on greased baking sheet.
Bake at 375° for 8-10 minutes or until lightly browned. Cool completely on wire rack.
Melt chocolate and shortening in a microwave; stir until smooth. Dip one end of each crescent into chocolate; decorate with sprinkles as desired. Place on waxed paper-lined baking sheet. Refrigerate for 30 minutes or until set. Store in an airtight container.