Irish Cream Tiramisu

Bahan-bahan (12 porsi)

• 1½ cups espresso or very strong black coffee, (cooled)
• 1 cup Baileys Irish Cream, (divided)
• 14 oz (or two 7-oz packs) Savoiardi cookies or ladyfingers (see note), although you won't use all of them
• 2 large eggs
• ⅓ cup cup superfine sugar ((to make your own, process regular granulated sugar in food processor for 30 seconds until fine))
• 16 oz mascarpone cheese
• 2½ teaspoons natural unsweetened cocoa powder, (such as Hershey's)