Preheat the oven to 425 degrees. Line a baking sheet with parchment. Whisk the flour, granulated sugar, baking powder, baking soda, dry buttermilk and salt in a medium bowl. Add the rosemary and/or chocolate chips, if using. In a small bowl, whisk the melted butter, vanilla and 1 cup cream. Stir the wet ingredients into the dry ingredients until just combined. Turn the dough out onto a floured surface and knead until smooth, about 1 minute.
Divide the dough into two balls; roll out each ball into a 1/2-to-3/4-inch-thick disk. Brush the tops of the disks with the remaining 2 tablespoons cream, then sprinkle with the coarse sugar. Cut each disk into 6 wedges. Transfer to the prepared baking sheet and bake until golden brown, 12-16 minutes. Transfer to a rack to cool.
Celebrity chef, TV host, New York Times best-selling author and San Diego mom Melissa d'Arabian is an expert on affordable and healthy home cooking. Well-known for her “Ten Dollar Dinners” show and cookbook, she also serves as a judge on Food Network's “Guy’s Grocery Games.” Melissa’s new "Supermarket Healthy” cookbook is available December 30. Preorder now at www.melissadarabian.net.