Temperature during baking should stay the same, but the baking time will need to be extended by about 1/3 of the time for a standard half sheet pan (25 to 30 minutes in this case). We would recommend that you consider using Baker's Percentages for scaling up the recipe though, Ted. Not only will this give you a bit more control over how much dough you make but also keep the quantity of ingredients more accurate. We generally suggest using this method when you more than doubling any recipe for best results.

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