Put the cream in a small saucepan and bring to a simmer over medium heat. Add the tea leaves, stir, remove from heat and let stand 10 minutes. Return the tea-infused cream to medium heat until just simmering. Pour the cream through a fine mesh strainer set over the bowl of chocolate. Shake the bowl to evenly distribute the cream and let stand 5 minutes to melt the chocolate. Stir until very smooth and let the chocolate cool to room temperature. Discard the tea leaves.
To make the s'mores in the oven, set an oven rack 6 to 8 inches from the broiler and preheat the broiler.
Put 8 graham cracker squares on a baking sheet and spread 1/2 teaspoon of the cooled chocolate over the entire surface of each square. Arrange mini marshmallows on each chocolate covered graham, being sure to cover the cracker completely. Spread about 1/2 teaspoon of the chocolate on each remaining graham crackers and set them aside.
Transfer the pan to the oven and toast the marshmallows under the broiler until deep golden brown, about 30 seconds. (DO NOT leave the oven - keep an eye on the marshmallows - they toast very quickly).
Remove the s'mores from the oven and top with the chocolate covered grahams, chocolate side down. Press lightly to spread the chocolate to the edges. Let the s'mores cool for 1 to 2 minutes before devouring.
To make s'mores the old fashioned way, and you have access to open flame, either a gas stove or fireplace, put 2 jumbo marshmallows on a metal skewer. Spread 1/2 teaspoon chocolate on each of 8 graham squares (this will be the bottom of the s'more). Dollop a teaspoon of chocolate onto the center of the remaining 8 squares and reserve (these are the tops).
Toast the marshmallows over an open flame until brown (or charred), as desired. While holding the skewer, put the toasted marshmallows onto the center of the bottom graham square. Invert a graham cracker top over the marshmallows and press lightly while you simultaneously pull the skewer from the marshmallows to create a sandwich. Repeat with the remaining marshmallows and serve while still warm.
Unused chocolate chai sauce can be stored in an airtight container in the refrigerator for up to a week. It can be melted and poured over ice cream or stirred into hot milk for chai-spiced hot chocolate.