Whisk the flours, sugar, baking soda, cream of tartar, and salt together in a large bowl. Work 2 Tbsp. of the butter into the dry ingredients with a fork until the texture resembles coarse crumbs. Stir in the buttermilk with a fork just until the dough begins to come together. Turn out onto a lightly floured counter. Knead just until the dough becomes cohesive and bumpy, about 30 seconds.
|