I know this may be some redundant information, but I can confirm that in 1994 PH was shipping all of the personal pan pizza doughs in frozen disk form.
On Pizza Hut's nutrician guide there are different ingredients listed for the regular pan pizza compared to the Person Pan Pizza. At the time I had assumed that only the Personal Pan Pizza used forzen dough. If all of their pan dough is frozen then I dont know why they would use different ingredients for the personal pizza
This is from Pizza Hut canada's website:
FROZEN PAN DOUGHS
1. Pan Dough, Frozen:
Enriched flour, water, cream yeast, salt, sugar, soybean oil, sodium stearoyl-2-lactylate,
acetylated tartaric acid esters of mono and diglycerides, ascorbic acid, enzyme, potassium
sorbate
2. 4 for All Dough, Frozen
Enriched Bleached Wheat Flour (wheat flour, malted barley flour, niacin, ferrous sulfate,
thiamine mononitrate, riboflavin, folic acid), water, vegetable shortening (Partially
hydrogenated soybean oil), yeast. May contain 2% or less of: salt, sugar, vital wheat
gluten, enzymes and ascorbic acid, fumaric acid.
FRESH PAN DOUGHS
1. Pan Dough Blend:
Salt, sugar, yeast (saccharomyces cerevisiae), wheat flour, monoglycerides (vegetable
origin), diacetyl tartaric esters of mono-di glycerides of fatty acids (vegetable origin),
ascorbic acid, fungal amylases (derived from A. niger and A. oryzae)
2. Pan Dough Flour
Wheat flour, benzoyl peroxide, niacin, iron, ascorbic acid, thiamine mononitrate, fungal
alpha amylase, riboflavin, folic acid
http://www.pizzahut.ca/files/pdf/en/ingredients.pdfEDIT (4/20/13): For the most recent PH ingredients list, see
http://www.pizzahut.ca/Fileupload/ingredients.pdf