– 3 cups cake flour spooned & leveled (345 grams) – 2 teaspoons baking powder – ½ teaspoon baking soda – ½ teaspoon salt – ½ cup buttermilk or whole milk room temperature (120 ml) – ½ cup sour cream room temperature (120 grams) – ¼ cup canola or vegetable oil (60 ml) – 1 tablespoon pure vanilla extract (15 ml)
– 1 cup unsalted butter softened (2 sticks or 230 grams) – 1 ¾ cups granulated sugar (350 grams) – 3 large eggs room temperature – 2 large egg yolks room temperature
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