"Some molten-cake recipes call for simply underbaking the batter so the middles stay lava-like, but mini cakes get done so quickly it's best to give them a filling that won't set up. These rich, mocha-flavored morsels are guaranteed to stay moist and gooey, owing to a simple mocha ganache in the middle. Serve the cakes with a scoop of low-fat coffee ice cream and garnish with a chocolate-covered espresso bean, if desired. Make Ahead Tip: Prepare through Step 5, cover and refrigerate for up to 2 days. After baking (Step 6), the cakes will keep in the pan, tightly covered with foil, for up to 1 day. The sauce (Step 7) will keep, covered, in the refrigerator for up to 5 days. To serve, reheat the cakes in the covered pan at 350°F for 10-12 minutes. Reheat the sauce in a microwave on Medium for about 20 seconds. | Equipment: 12-cup mini muffin pan..."