The Smurfette Creating Formula is the formula that was used to create Smurfette, Sassette, and possibly Nanny Smurf (although nothing definite has been revealed about her origin). It is unknown where Gargamel got the formula from. The formula used in The Sassette is very different from the spell used in The Smurfette, mainly because it requires a chant, and no other ingredients besides blue clay. This is probably a lack of continuity.