2 cups all-purpose flour
1/3 cup sugar
1 tsp baking powder
1/4 tsp baking soda
1/2 tsp salt
8 tbsp unsalted butter (cultured is best!), frozen
1/2 cup sour cream
1 large egg
Blackberries & raspberries (optional)
Step 1) Adjust oven rack to lower-middle position and preheat oven to 400 degrees.
Step 2) In a medium or large bowl, mix flour, 1/3 cup sugar, baking powder, baking soda and salt. Grate butter into flour mixture on the large holes of a box grater; use your fingers to work in butter (mixture should resemble coarse meal)
Step 3) In a small bowl, whisk sour cream and egg until smooth.
Step 4) Using a fork, stir sour cream mixture into flour mixture until large dough clumps form. Use your hands to press the dough against the bowl into a ball. (The dough will be sticky in places, and there may not seem to be enough liquid at first, but as you press, the dough will come together.)
Step 5) Place on a lightly floured surface and pat into a 7- to 8-inch circle about 3/4-inch thick. Sprinkle with remaining 1 tsp. of sugar. Use a sharp knife to cut into 8 triangles; place on a cookie sheet (preferably lined with parchment paper), about 1 inch apart. Add fresh fruit on top & sprinkle with honey. Bake until golden, about 15 to 17 minutes. Cool for 5 minutes and serve warm or at room temperature.