Not everyone would call these rich chocolate desserts cupcakes. But they're baked in cupcake liners, and the milk chocolate is so luscious that you won't care what they're called.
Heat oven to 325 degrees F. Line a standard-size 12-cup muffin pan with paper liners.
Melt chocolate in top of double boiler over simmering water.
Stir eggs and flour into melted chocolate with wire whisk or wooden spoon. Ladle into prepared muffin-pan cups, dividing equally.
Bake in 325 degree F oven for about 12 minutes or until sides of cupcakes are set but centers are still liquid. Cool cupcakes in pan for 5 to 10 minutes. Centers will set into warm mousse. Garnish with chocolate curls, if desired. Peel off the cupcake papers carefully.