[Indian] How to cook Masala chai carrot cake

Ingredients
- ¼ cup Indian black tea leaves, such Darjeeling or Assam
- 60 ml (¼ cup) boiling water
- 350 g (2â…“ cups) plain (all-purpose) flour
- 1¼ tsp baking powder
- 1 tsp bicarbonate of soda
- 1 tsp ground cinnamon
- ½ tsp ground green cardamom
- 1 tsp ground ginger
- ½ tsp fine sea salt
- 450 g carrots, peeled, shredded
- 295 g (1â…“ cups) caster sugar
- 100 g light brown sugar
- 4 eggs
- 350 ml vegetable oil
- 150 g (1 cup) raisins
- ½ cup chopped candied roasted pistachios, for garnish (optional)
Pistachio cream cheese frosting
- 340 g full-fat cream cheese, softened
- 80 g unsalted butter, softened
- ¼ cup sour cream
- 1 tsp pistachio extract (see Note)
- ¼ tsp fine sea salt
- 200 g icing (confectioner's) sugar, sifted
Directions