The Perfect Gluten Free White Cake

INGREDIENTS

2 cups

(280 g) all purpose gluten free flour (I used Better Batter)

1 tsp

xanthan gum (omit if your blend already contains it)

1/4 cup

+ 2 tablespoons (54 g) cornstarch

2 tsp

baking powder

1/2 tsp

baking soda

1/2 tsp

kosher salt

12 tbsp

unsalted butter, at room temperature

1 1/2 cups

granulated sugar

1 tbsp

clear vanilla flavoring (I used McCormick brand)

egg whites (150 g), at room temperature

1 1/3 cups

(10 2/3 fluid ounces) buttermilk, at room temperature