I don't know what to tell you Jan..because there isn't much tweaking you can do to the recipe. Did you try cutting back on either the lemon pie filling or the water? There are a lot of variations of this easy recipe..maybe you might try one of them. For instance you can substitue 1 cup of coconut for the water and use a regular 9x12 pan. The flavor would be a little different but if you like coconut,it should be good. I think I might try this recipe. What size pie filling are you using? I use the 18 oz.size.

That much extra baking time sounds like the oven temperature is off. Did you check it with a thermometer? And made sure it preheated to temp before putting the pan in?

I may be using a bigger can than 18oz. I 'll check it and try again. Oven temp is OK, checked that first. Thanks.

Jan