Beat butter and cream cheese in a large mixing bowl with an electric mixer on medium to high speed for 30 seconds. Add powdered sugar and beat until combined. Beat in 1 teaspoon of the orange peel. Beat in as much flour as you can with the mixer. Stir in remaining flour with a wooden spoon. Divide dough in half. Cover and chill about 1 hour or until easy to handle.
Roll each portion of dough on a lightly floured surface until 1/8 inch thick. Cut into circles with a floured 2-1/2-inch cookie cutter. Place circles on an ungreased cookie sheet.
For filling, stir together mincemeat, orange juice, and remaining 1 teaspoon orange peel. Place about 1 teaspoon of the filling in the center of each circle. Moisten the edge of each circle with a little water. Bring up two adjacent edges of dough and pinch and seal, forming a cornucopia.
Bake in a 375 degree F oven for 12 to 15 minutes or until bottoms are lightly browned. Transfer to wire racks to cool. Makes about 48.