Strawberry Thyme Buckwheat Scones
2¼ cups plus 2 tablespoons all-purpose flour
¾ cup plus 2 teaspoons buckwheat flour
2 teaspoons aluminum-free baking powder
½ teaspoon baking soda
1 tablespoon fresh thyme
2 tablespoons sugar (ideally 1 tablespoon granulated and 1 tablespoon turbinado, otherwise 2 tablespoons granulated)
½ cup unsalted butter, cold and cut into 8–10 pieces
10 ounces strawberries, hulled and cut into ½-inch dice (2 cups)
¾ cup crème fraîche (can substitute full-fat sour cream)
2 tablespoons vanilla extract
1 large egg
1 egg yolk
Set a rack in the center of the oven and preheat to 350°. Line two baking sheets with parchment paper.
Briefly mix together the flours, baking powder, baking soda, thyme, and 1 tablespoon of the granulated sugar, until just combined.
Add the cold butter pieces and pulse/beat on low speed, until the butter is beginning to break down, but there are still pieces the size of a pea. This takes about 15–30 seconds in a food processor, 30–60 seconds in a stand mixer, and likely a few minutes by hand (using two butter knives or a pastry blender to cut the butter into the flour).
Turn the flour mixture into a large bowl and use a wooden spoon to gently fold in the strawberries.
In a small bowl, whisk together the crème fraîche, vanilla, egg, and egg yolk. Use the wooden spoon to combine the wet ingredients into the flour mixture and stir until the dough just comes together. The dough may need to be kneaded once or twice by hand, and will be soft and very sticky.
Use a ½-cup measuring cup to scoop out rounds of dough and set them at least 2 inches apart on the lined baking sheets. Sprinkle the 1 tablespoon of turbinado or granulated sugar across the tops of the scones. Put one baking sheet in the refrigerator to keep the dough cool while the other sheet bakes. Bake the scones for 30–35 minutes, rotating the sheet halfway through, until the scones are golden brown on the edges and pale golden brown in the centers. Let the scones cool on the baking sheet for 5 minutes, then transfer to a cooling rack to cool a few more minutes. Serve warm.