Step 1

Preheat the oven to 325 degrees F, mist three 6-inch cake pans*** with non-stick spray, and line them with circles cut from parchment paper.

Step 2

Place the cake flour, all-purpose flour, sugar, baking powder, baking soda, and salt in the bowl of an electric mixer, and stir on low speed to combine.

Step 3

Add the butter, mixing on medium-low speed until the mixture resembles damp sand (about 1 minute.

Step 4

Add the eggs, one at a time, scraping the bottom and sides of the bowl to be sure all of the ingredients are fully incorporated.

Step 5

Add the yogurt, milk, and vanilla.

Step 6

Mix on medium speed for 2 to 3 minutes, to aerate the batter and build the cake's structure.

Step 7

Divide the batter equally between the prepared pans, and bake for 30 to 40 minutes, or until a toothpick inserted in the thickest part of the cake comes out clean or with a few moist crumbs.

Step 8

Cool completely before filling and frosting.