Grandma Louise called this her potluck secret—sweet, creamy, and gone before the coffee finishes brewing.

To serve, remove the dish from the freezer and let it stand at room temperature for 10–15 minutes to soften slightly. Use a sharp knife dipped in warm water and wiped dry between cuts to slice into neat squares, or scoop with a sturdy spoon for a more casual presentation.

Return any leftovers to the freezer, well covered. The salad keeps its best texture for about 1–2 weeks, though in true potluck fashion, it rarely lasts that long.

For a slightly lighter version, swap half of the sour cream for plain Greek yogurt; you’ll keep the tang while trimming some richness. If you prefer a more old-school, extra-sweet profile, replace the whipped cream with non-dairy whipped topping and add an extra tablespoon of sugar. Stir in 1/2 cup shredded sweetened coconut or 1/2 cup chopped toasted pecans or walnuts for more texture and a nod to classic Midwestern ambrosia salads. You can also change up the fruit: use one can of fruit cocktail and one can of crushed pineapple (well drained), or add a handful of frozen sliced strawberries (thawed and drained) for more color. For individual servings, spoon the mixture into muffin tins lined with paper cups, freeze, then peel off the papers for single-serve treats. To keep it kid-friendly and less messy at a potluck, freeze in a slightly larger 9×13-inch glass dish for thinner, easier-to-hold bars. Finally, if your crowd prefers a softer, fluffier texture, serve it semi-frozen: chill it in the refrigerator for 3–4 hours instead of fully freezing, and spoon it out like a creamy fruit fluff.