Creating Heart-Shaped Tiramisu Cups can be straightforward if you follow these simple steps:

1. Prepare the Espresso: Brew the espresso and let it cool. If using, mix in the coffee liqueur.
2. Whip the Cream: In a mixing bowl, whip the heavy cream until soft peaks form.
3. Combine Mascarpone and Sugar: In another bowl, mix the mascarpone cheese, powdered sugar, and vanilla extract until smooth and creamy.
4. Fold in Whipped Cream: Gently fold the whipped cream into the mascarpone mixture until well combined.
5. Prepare Ladyfingers: Quickly dip each ladyfinger into the cooled espresso, ensuring they are soaked but not soggy.
6. Layering: In heart-shaped cups, place a layer of soaked ladyfingers at the bottom, followed by a layer of the mascarpone mixture. Repeat the layers, finishing with the mascarpone mixture on top.
7. Chill: Cover the cups and refrigerate for at least 4 hours or overnight to allow the flavors to meld.
8. Garnish: Before serving, dust the tops with cocoa powder and add dark chocolate shavings if desired.

These steps will guide you in creating these incredible heart-shaped cups effortlessly.