Whisk the dry ingredients together. Using a box grater, grate the frozen butter into the dry ingredients.
Incorporate until texture is coarse with large sized pieces of butter still in the mix.
Drizzle in milk and knead until it becomes a homogenous dough.
Using either your hands or rolling, flatten to 1/2 inch thick. Cut into squares using a chef's knife and place on greased baking sheet. Bake for 15-20 minutes until golden around the edges.