Preheat your oven to 425°F. Line a cookie sheet with parchment paper.
Mill the soft white wheat berries on the lowest setting of your grain mill.
In a large bowl, whisk together the fresh-milled flour, baking powder, sugar, and salt.
Remove the butter from the freezer and cut it into chunks. Add it to the flour mixture. Use a pastry cutter, fork, or box grater to cut the butter in until the mixture resembles coarse crumbs.
Pour in the milk and stir with a spatula, wooden spoon, or fork until just combined.
Set the dough on a lightly floured surface. Use your hands to gently press and bring the dough together—it should come together quickly.
Fold the dough in half over itself and gently press down to flatten a bit. Turn the dough a quarter turn, then fold it in half again. Repeat 5–6 times, being careful not to overwork.
Using your hands (not a rolling pin), flatten the dough to about 1 inch thick. Lightly dust a biscuit cutter with flour and press straight down—do not twist. Repeat until you have about 12 large biscuits.
Place biscuits on the prepared baking sheet.
Bake for 15–18 minutes, until golden brown.