Salt and Sugar Biscuits

Ingredients (10)

• 3 cups all-purpose flour
• 1 teaspoon kosher salt
• 2 teaspoons baking powder
• 1 1/2 teaspoons baking soda
• 3/4 cup unsalted butter
• 1 1/2 cups buttermilk
• 2 tablespoons coarse sugar
• Butter, for topping
• Flakey sea salt, for topping
• Coarse sugar, for topping