Is it o.k. to use frozen cranberries in this recipe?

I actually prefer to use frozen fruit in baked goods, as it tends not to "bleed" as you mix it into the batter. This is especially nice for things like scones where you have to knead the dough just a little bit.

Definitely okay!

i'd say yes. i generally buy a lot of cranberries when they're available, then freeze for use after they disappear from the market. i use them in recipes just like fresh, but their texture does change, so they're best cooked or in baked goods. add a bit of time to the baking as they do chill the dough.

I would think so. Frozen cranberries work fine in exchange for fresh in most recipes. I have done it with a cranberry apple cake.