Snickerdoodle Cake – Tim Howell

Ingredients

• 12 tablespoons (1 1/2 sticks) unsalted butter, at room temperature, plus more for greasing the pans
• 2 1/2 cups all-purpose flour
• 2 teaspoons baking powder
• 1 teaspoon ground cinnamon
• 1/2 teaspoon fine salt
• 6 large egg whites
• 1 cup whole milk, at room temperature
• 1 tablespoon pure vanilla extract
• 1 1/2 cups sugar
• Pinch cream of tartar
• 3/4 cup plus 1 tablespoon sugar
• Pinch fine salt
• 4 sticks (16 ounces) unsalted butter, cut into 1 1/2-inch chunks, at room temperature
• 1 1/2 teaspoons ground cinnamon
• 1/2 teaspoon pure vanilla extract
• 3 cups confectioners’ sugar
• 1 cup butter
• 1 to 2 tablespoons whipping cream