1Mix 3 packages cream cheese and the Cheddar cheese; divide into 3 equal parts. Combine 2 parts to equal two-thirds of mixture; mix in pesto. Mix onion, mustard and pepper sauce into remaining one-third mixture.
2Cover each cheese mixture and refrigerate about 4 hours or until firm enough to shape. Shape each cheese mixture into ball. Wrap each ball, label and freeze.
3About 12 hours before serving, remove balls from freezer. Thaw in wrappers in refrigerator.
4Arrange balls on serving plate with smaller ball on top for head of snowman. Frost snowman with whipped cream cheese before serving. Decorate as desired. Serve with crackers. Store covered in refrigerator.