Been baking cake in 13x9x2 pan and having thin cakes. Reason being bec. Of the cake mix boxes being less amount than the old ones. Before was 18 oz. now 15 oz. ,would there be any problem with making up two boxes separately with the ingr. Called for on the box to make cake,and add to my pan. And use the rest for cupcakes? Is there any reason why this would be wrong? Or is there another way I could do this .....to make up the difference I need.
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