Parmesan-Biscuit Topping | America's Test Kitchen

Ingredients

• 1 cup (5 ounces/142 grams) all-purpose flour, plus more for dusting the work surface
• 1 cup (4 ounces/113 grams) plain cake flour
• 2 teaspoons baking powder
• 1/4 teaspoon baking soda
• 1 teaspoon sugar
• 1/2 teaspoon salt
• 5 tablespoons unsalted butter, chilled and cut into 1/4-inch cubes
• 4 ounces (113 grams) grated Parmesan cheese
• 3/4 cup cold buttermilk, plus 1 to 2 tablespoons if needed