Spicy Polenta-Cheese Crackers

INGREDIENTS

• Equipment: A food processor or a blender; 2 nonstick baking sheets; a 1 3/4-inch round biscuit cutter or a glass.
• 1 cup bread flour (hs note: white whole wheat flour works as well)
• 1 cup instant polenta
• 3/4 teaspoon fine sea salt
• 1/2 teaspoon baking soda
• 1/4 teaspoon cayenne pepper
• 1/2 cup freshly grated Parmigiano-Reggiano cheese
• 2 1/2 tablespoons cold unsalted butter, cut into 1/4-inch pieces
• 3/4 cup buttermilk, shaken to blend