It is best to make Caprese salad right before serving it as basil loses its shape and beauty when you leave it to sit in the refrigerator. However, you can make this salad ahead if you don’t mind your basil looking slightly wrinkly and darker (avoid cutting basil if you are making the salad ahead of time). With cherry tomatoes, you can leave them in the salad without cutting them so that they don’t lose their shape. The salad will last up to 2-3 days in the refrigerator.