Prepare the cream cheese mixture:
Place 250g cream cheese in a bowl, add 30g sugar, and use a spatula to mix until the sugar is fully incorporated into the cream cheese. Set aside.
Make the Earl Grey tea mixture:
Pour 45g milk into a small saucepan and heat until it just starts to simmer (small bubbles form at the edges). Remove from heat. Immediately add 2 Earl Grey tea bags, stir, and let the tea steep for 3–5 minutes, allowing the tea to infuse the milk with color.
Dissolve the gelatin:
Soak 8g gelatin sheets in cold water for 5-10 minutes until softened. Once the tea has steeped, remove the gelatin sheets, squeeze out excess water, and add them to the tea mixture, stirring until completely dissolved.
Combine cream cheese and tea mixture:
Gradually pour the tea mixture into the cream cheese mixture, stirring constantly to ensure they blend smoothly into a silky cream cheese Earl Grey mixture.
Whip the cream:
Pour 200g room-temperature whipping cream into a clean bowl. Use an electric whisk on medium speed to whip the cream until it reaches a thick, yogurt-like consistency. When you lift the whisk, the cream should fall slowly and form soft peaks that don't disappear immediately.
Mix the mousse:
Gently fold the whipped cream into the Earl Grey cream cheese mixture with a spatula, stirring from the bottom up until the mousse is smooth and well-mixed.
Chill to set:
Pour the mousse into containers, filling them about halfway. Gently tap the containers to release air bubbles, then place them in the fridge to chill for 15 minutes to allow the mousse to set slightly.