Gluten Free White Cake

INGREDIENTS

8 tbsp

butter, softened ( (4 ounces; 113 grams))

1/2 cup

vegetable shortening ((3 1/4 ounces; 92 grams))

1 3/4 cups

granulated sugar ((12 1/4 ounces; 347 grams))

2 3/4 cups

gluten-free flour blend (see note) ((13 3/4; 389 grams))

1 tbsp

baking powder ((1/2 ounce; 14 grams))

3/4 tsp

salt

2 tsp

vanilla extract

1 tsp

almond extract, optional

large egg whites ((about 7 ounces; 198 grams))

1/2 cup

milk ((4 ounces; 113 grams))

1/3 cup

sour cream ((2 2/3 ounces; 66 grams))

1 1/4 cups

butter, softened ((2.5 sticks; 10 ounces; 287g))

5 cups

powdered sugar, sifted ((20 ounces; 580g))

1/3 cup

heavy or whipping cream ((2 2/3 ounces; 66 grams))

2 tsp

pure vanilla extract

1/4 tsp

salt