Preheat the oven to 350 degrees F. Spray organic oil or spread butter into 3 4-inch diameter cake pans. Line each cake pan with a circular piece of parchment paper.
Into an electric mixer bowl, add the all-purpose flour, cake flour, baking soda, sugar, kosher salt, and baking powder. Mix on a low speed to combine the dry ingredients.
Add the unsalted butter to the mixer and increase the speed to a medium-high. Continue to mix until a sandy mixture occurs.
Next, add in the one egg. Once well incorpoated, turn off the mixer and scrape the sides to the bottom of the bowl.
Add the milk, Greek yogurt, strawberry preserves, crushed freeze-dried strawberries, strawberry extract, and vanilla extract. Stir until fully combined and fluffy. (Roughly 2 minutes).
Evenly divide up the cake batter into the cake pans. Bake for 18-25 minutes, or until inserted toothpick comes out clean.
Allow the cakes to fully rest before adding frosting.*