Preheat the oven to Gas Mark 4 or 180 degrees C.
Butter a casserole dish or deep oven tin (9 x 13 inches).
Combine the sifted dry ingredients to a medium bowl - Plain Flour, Baking Powder, Chai Spice Blend and Salt in a large bowl.
Separate Eggs and place Egg Whites and Yolks in separate bowls.
Beat the egg whites in the bowl of an electric mixer for 1 minute before adding 50g of the sugar and beating for another minute. Continue to beat for 1 – 2 minutes until soft peaks are formed.
In a separate bowl, beat Egg Yolks with remaining sugar for 2 minutes.
Add the Milk to the Egg Yolk mixture and whisk to combine.
Add the Flour mixture to the Egg Yolk mixture slowly.
Add Whites to Yolks. Fold in gently.
Pour into greased tin/dish and place in the preheated oven. Then bake for 25 – 30 minutes.
Allow to cool for 30 minutes.
Make the Milk Syrup by combining the Evaporated Milk, Condensed Milk and Double Cream in a large bowl or jug. Add Chai Spice and mix to combine. Once this delicious fluffy Cake has cooled, pierce all over with a fork and drizzle in the chai-infused milk.
Beat the Cream with Sugar until soft peaks form. Pipe or spread on the top of the cake.
Cover and place in the fridge for 2 - 5 hours.
Top with crumbled Biscuits/Cookies if using.
Make the additional Syrup if using and serve cake with syrup in bowl