Stir together the flour, sugar, baking powder and salt.
Grate the frozen butter (I use a food processor with coarse cheese shredding disk). But generally try not to handle it.
Add the butter to the flour and gently toss.
Zest the lemon and add that to the flour with the cranberries.
Whisk the heavy cream, egg, extracts, and juice from the lemon.
Make a well in the center of the flour and add the wet mix and stir with a spoon to get it mixed somewhat, then knead gently just until the flour is completely worked in.
Turn the dough out onto a parchment lined baking sheet and pat into a disk half inch thick.
Brush with cream and then sprinkle with coarse sugars.
Cut into six wedges with a chef's knife and slide the blade beneath then gently lift them away from each other.