2 cups all-purpose flour
1 tablespoon baking powder
2 tablespoons granulated sugar
1/2 teaspoon salt
1 1/4 sticks (1/2 cup plus 2 tablespoons) unsalted butter, 1 stick cold and cut into 1/2-inch cubes and 2 tablespoons melted
1 large egg
1/2 cup well-shaken chilled buttermilk
3 tablespoons turbinado sugar such as Sugar in the Raw
3/4 teaspoon cinnamon
Special equipment: parchment paper; a 2 1/2-inch round biscuit cutter
Accompaniments: softened butter and jam

cinnamon, sugar, biscuits

2 cups all purpose flour
2 1/2 teaspoons ground cinnamon
1 teaspoon baking powder
1/4 teaspoon salt
1 cup plus 3 tablespoons sugar
6 tablespoons (3/4 stick) unsalted butter, room temperature
2 large eggs
1 large egg yolk
1 teaspoon vanilla extract
cinnamon, sugar, biscotti

2 cups all purpose flour
1 teaspoon ground cinnamon
1/4 teaspoon (generous) salt
1 cup (2 sticks) unsalted butter, room temperature
2/3 cup (packed) golden brown sugar
1/2 cup walnuts, toasted, finely chopped

4 ounces bittersweet (not unsweetened) or semisweet chocolate, chopped
cinnamon, brown, sugar

1 1/4 cups all purpose flour
1 teaspoon baking powder
1/4 teaspoon salt
1/2 cup (1 stick) unsalted butter, room temperature
3/4 cup plus 1 1/2 tablespoons sugar
2 large eggs
1 tablespoon fresh lemon juice
1 teaspoon grated lemon peel

5 large plums (about 1 1/4 pounds), pitted, cut into 1/2-inch wedges
1/4 teaspoon ground cinnamon
cinnamon, sugar, plum