Start by browning the butter. Measure the butter into a saucepan and place over a medium heat. Stir until the butter has melted.
Add the Whittard Cinnamon & Vanilla Chai Loose Leaf Tea. Continue to heat for another 4-5 minutes, swirling the pan occasionally, until the melted butter is foamy on top, a golden amber colour beneath and has a nutty aroma. Be careful not to overheat as otherwise the butter with burn and turn bitter.
Strain the chai-infused brown butter through a sieve into a mixing bowl and leave to cool for 10 minutes.
Now, mix in the brown and white sugars until well combined.
Mix in the egg, egg yolk and vanilla extract.
Fold in the flour and salt until the mixture comes together to make a thick cookie dough.
Chop the white chocolate into smallish chunks and fold into the dough.
Scoop up heaped tablespoons of cookie dough and roll into balls, placing them on a lined baking tray as you go. You should be able to make 12 cookies from this recipe.
Cover the cookies with foil and place in the fridge to chill for 1 hour.
Preheat the oven to 180°C (fan) and line two large baking trays with baking paper.
Place 4-5 cookies on each baking tray, leaving at least 8cm of space between each, so the cookies have room to spread a little.
Bake for 10 minutes until golden and firm around the edges. The middle should look pale and underbaked. Leave to cool on the baking tray while you make the chai glaze.