Preheat the oven to 325℉
Grease and flour three 8x2 round cake pans. We like to line the bottom with parchment also.
In the bowl of your mixer, combine the dry ingredients: cake mix, cake flour, sugar, and salt. Mix or stir to combine.
Add lemon juice, lemon flavoring, and lemon zest to the 1 ¼ cup milk (It will thicken to a buttermilk consistency).
Add eggs, cream cheese, vegetable oil, and milk/lemon mixture to the dry ingredients. Mix on low speed for about 20 seconds to incorporate and increase medium speed for 2 minutes. (Stop at the halfway point to scrape the sides of the bowl if needed). We used a stand mixer with paddle attachment. You can also use a handheld mixer.
Divide the cake batter between the three prepared 8 inch cake pans. Bake at 325 for 22-25 minutes. Baking times may vary, the cake is done when a toothpick can be and inserted and removed with no crumbs (or just a few) attached. Or, if you can lightly touch the center and it springs pack, it is done.
This recipe makes about 6.5-7 cups of batter. Works for cupcakes also.