Prepare Chai-Infused Milk: In a small saucepan, combine the Spice Delights Chai Spice Pack with 1 1/2 cups of milk. Simmer on low heat (do not boil) until the milk is slightly darker in color and is infused with the chai flavors. Strain and set aside 1-2 tablespoons for the frosting.
Prepare Chai Milk and Butter Mixture: In the container with the strained chai-infused milk, add butter and vanilla extract. Mix until the butter is completely melted.
Preheat Oven and Prepare Pan: Grease and flour-dust a standard Bundt cake pan, a 12-cup tube pan, or a 9 x 13 pan and preheat the oven to 325°F (163°C).
Mix Dry Ingredients: In a bowl, sift together the flour, baking powder, and salt. Set aside.
Prepare Egg Mixture: In another container, use a hand mixer to beat the eggs and sugar until it triples in volume.
Combine Wet and Dry Ingredients: Slowly add the chai-infused butter mixture to the beaten eggs until well incorporated. Then, add all the dry ingredients slowly in 2-3 parts, mixing well.
Bake: Pour the batter intothe prepared pan and bake for 55 minutes to 1 hour and 5 minutes. Check at the55-minute mark with a toothpick.
Prepare Frosting: While the cake is cooling, make the frosting. Mix cream cheese and butter until fluffy. Add powdered sugar, ground cinnamon, ground ginger, ground cardamom, and remaining chai-infused milk until you reach a good consistency. Add more milk if the frosting is too thick or more sugar if it is too thin.
Frost and Decorate: Once the cake is cooled, spread the cream cheese frosting on top. Decorate as desired.