For the Cake:

• 1 cup whole milk, room temperature
• 5 tablespoons all-purpose flour
• 1 teaspoon pure vanilla extract
• 1 teaspoon pure almond extract
• 1 cup (2 sticks) unsalted butter, room temperature
• 1 1/4 cups granulated sugar
• 1/4 teaspoon salt
• 1, 15.25 ounce package white cake mix
• 1 cup all-purpose flour
• 1 cup granulated sugar
• 3/4 teaspoon salt
• 1 1/3 cups room temperature water
• 1 cup sour cream, room temperature
• 2 tablespoons vegetable oil (or refined coconut oil)
• 1 1/2 teaspoons pure almond extract
• 1 teaspoon pure vanilla extract
• 4 egg whites, room temperature

For the Frosting:

• 1 cup milk
• 5 tablespoons flour
• 1 teaspoon vanilla extract
• 1 teaspoon almond extract
• 2 sticks unsalted butter, room temperature
• 1 1/4 cups granulated sugar
• Pinch of salt