So you're telling me there's no font used in the words "Mrs. Butterworth's" ?
Yes, there is no font used to create this logo. The tell is in the common letters. In this case, the "t". Each "t" in the logo is different. If this logo was created with a font, all the "t's" would be identical. This was hand-drawn (either traditionally or digitally) but no "font" was used.
You could look for a hand-written style font that might be similar, but not with this exact letter form.
Hope it helps even if it is not the answer you were looking for.
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