As someone with a 7 qt KitchenAid mixer bowl myself, I feel you! I borrowed a smaller tilt-head mixer from my mother in law for the purposes of testing this recipe. If you have a bowl-lift KitchenAid mixer with a 5, 6, or 7 qt bowl, just increase the amount of meringue you're making. Use 3 egg whites and 6 oz sugar, or 4 egg whites and 8 oz sugar. You'll likely have excess meringue at the end but you can pipe it out onto lined sheet pans and let it dry out in the oven — it's great for decorating cakes, pies, and as a snack.