We prefer the balanced flavor of home-frozen bananas for this recipe, but you could also use store-bought frozen slices in a pinch. Six medium bananas is equivalent to about 4 cups frozen slices. Food Network defines lower sugar as less than 8 grams of added sugar per serving, lower-calorie as 250 calories or less per serving for desserts, lower-fat as 10 grams or less total fat per serving and diabetes-friendly as about 30 grams or less of carbohydrates per serving.