Preheat the oven to 275 degrees.
Place ramekins on a sheet pan. Make sure it’s deep enough to fill with water halfway up the ramekins.
Whisk together all the eggs and sugar, set aside.
Pour the cream in the small pot and heat on medium. Bring up to a simmer, stirring occasionally so it doesn't burn. Be careful that it doesn't boil over. Remove from the heat immediately after it comes up to temp.
Stir in the chocolate & espresso into the cream until it
Very slowly whisk the melted chocolate into the egg mixture: whisking the eggs continuously as you’re pouring the chocolate in (this will prevent the eggs from scrambling).
If desired transfer to a pourable cup and pour evenly into the ramekins.
Very carefully add hot water half way up the ramekins and gently place on the middle rack of the oven.
Bake for 45 minutes. Gently tap the ramekin to check if its finished - it should jiggle slightly but not a ton. If it’s too jiggly then bake 10-15 more minutes.
Remove and let cool to room temp. Remove from the water and wrap well before refrigerating. Place in fridge until firmed, about 2-3 hours.