MAKES 9 LARGE POPOVERS Serve these puffy delights fresh from the oven with butter and preserves or alongside holiday roasts to sop up sauces. Though best the day they’re made, they can be prepared a day ahead, kept covered in the fridge, and crisped in a 350°F oven for 5 minutes or a microwave for 1 minute just before serving. Popovers should not be baked close together because they expand quite a bit in the oven. Here, we distribute the batter between two muffin tins. You can also use nine well-greased 3/4-cup ceramic custard cups placed 4 inches apart on a rimmed baking sheet and baked 5 to 8 minutes longer than the directions below.