Everything Scones Recipe from Jessica Seinfeld

Ingredients

• 2 cups all-purpose flour
• 3 tablespoons sugar
• 2½ teaspoons baking powder
• ¼ teaspoon baking soda
• ½ teaspoon kosher salt
• ½ cup (1 stick) very cold unsalted butter
• 6 tablespoons buttermilk (shaken), plus more if necessary
• 1 large egg
• ¼ cup “everything” seasoning used on bagels