This chai cake is a simple 9×13-inch brown sugar spice cake with a moist, springy crumb and mild chai flavor. The one-bowl cake batter is made with sour milk and a prepared chai spice blend, then finished with a smooth cream cheese frosting.
Measure the sour milk and slowly add into the mixing bowl blending well after each addition.
1¼ Cup Sour Milk
When the batter is fully blended measure and add in the chai spice.
Pour the cake batter into a prepared 9 by 13 baking dish. And bake in preheated oven for 45 minutes or until cake tests for done.
Remove from oven and let cool on wire rack.
Cream Cheese Frosting
Measure the cream cheese and salted butter into a mixing bowl. They should be softened first.
½ Cup Cream Cheese, ¼ Cup Salted Butter
Using a hand mixer or stand mixer on low speed cream the cheese and butter until light.
Add in two cups of icing sugar and blend well.
3 Cups Icing Sugar
Measure in the remaining sugar and the vanilla extract.
1 Tsp Vanilla Extract
Blend until vanilla is well distributed and the frosting is cream and smooth.
Assembly
When the cake has completely cooled frost with the cream cheese icing.
If the icing is cold from the fridge let it come to room temperature before working.
Smooth onto the cake in any desired pattern.
Storing and Serving
Serve cake in large square pieces. Cake will cut into 12 large pieces or 24 small pieces.
Store remaining cake covered with plastic wrap in the fridge for up to five days.
Unfrosted cake can be frozen for up to three months.
Notes
Chai Blend: Tea masala can be used instead of prepared chai spice. I have made the cake with both; expect some difference in the color and flavor depending on the blend you use.Brown Sugar: Dark brown sugar can be used when golden brown sugar is unavailable. Both have worked well in this cake.Frosting Amount: The frosting makes a thinner layer over the full 9×13-inch cake. Double it if you prefer a much thicker layer.Other Pan Sizes: I have only tested the baking time in a glass 9×13-inch dish. The batter can be divided into other pans or cupcake cups, but the yield and baking time will need to be adjusted.Serving Temperature: I prefer the cake closer to room temperature, while my partner prefers it chilled. Either works; the crumb will feel softer as the cake warms slightly.