Yes. For a 9x9 pan, you can either make the recipe as is and it will be slightly thinner, or increase all the ingredients a little. Use these amounts: 1 2/3 cups crushed pretzels, 3 tablespoons brown sugar, 9 tablespoons butter, 3 ounce package strawberry gelatin, 1 cup boiling water, 3/4 cup cold water, 6 ounces cream cheese, 1/3 cup granulated sugar, 1 1/2 cups Cool Whip plus more for dolloping on top. To make Easy Strawberry Pretzel Salad in a 13x9 inch pan, simply double all the ingredients from the original amounts.