For the Vanilla Layer:
1 cup heavy cream
½ cup whole milk
¼ cup sugar
1 tsp vanilla extract
1 ½ tsp powdered gelatin (or 1 sheet)
2 tbsp cold water

Topping (optional):
Cocoa powder, chocolate shavings, or whipped cream

Instructions:
Bloom gelatin: In two small bowls, sprinkle gelatin over cold water (one for each layer). Let sit 5 min.
Make coffee layer: In a saucepan, heat cream, milk, sugar, and coffee until hot but not boiling.
Remove from heat, stir in bloomed gelatin until dissolved. Pour into serving cups (about halfway). Chill for 1–2 hours until set.
Make vanilla layer: In another saucepan, heat cream, milk, sugar, and vanilla until hot. Stir in bloomed gelatin until dissolved. Let cool slightly (so it doesn’t melt the coffee layer). Gently pour over the set coffee panna cotta. Chill 2–4 hours, or overnight, until fully set.
Finish & serve: Dust with cocoa, add chocolate shavings, or a dollop of whipped cream on top.