Combine dry ingredients. Cream sugar and shortening together until light and fluffy. Add milk, orange extract and grated orange rind. Gradually add dry ingredients. Fold in cranberries. Form dough into 2 logs, each about 1 1/2 inches in diameter. Wrap in waxed paper and chill for at least 8 hours. Preheat oven to 375 degrees Fahrenheit and lightly grease cookie sheets. Slice logs into 1/4-inch thick slices and bake for 12-15 minutes.