These refreshing bars feature a crunchy graham cracker crust layered with creamy vanilla frozen yogurt and a vibrant mixed berry swirl, making them a perfect no-bake treat for hot days.
Storage: Keep bars frozen in an airtight container for up to 2 weeks. Make-ahead: Prepare and freeze up to 3 days in advance. Variations: Use Greek yogurt instead of frozen yogurt for a tangier bar, or swap graham crackers for gluten-free cookies. Serving suggestion: Let bars sit at room temperature for 5 minutes before serving for easier slicing.