Mix together dry ingredients. Add frozen, grated butter and mix gently to coat. Combine the egg, milk and Chai tea concentrate. Pour over the flour mixture and mix until dough comes together.
Bake in preheated 400 degree oven for 12-15 minutes, until golden brown.
On rice-floured baking sheet, pat dough into a 8" circle. Refrigerate until ready to bake. If you wait a while, you will be able to cut the dough into wedges before baking. If baked immediately, cut when out of oven. Brush with melted butter and sprinkle sugar on.