Heat the oven to 350 degrees F. Using a stand mixer with the paddle attachment or a regular mixer with beaters, combine the flour, baking powder, salt, baking soda, 2/3 cup brown sugar, and the ground coffee beans. Add the butter and mix on low speed until the pieces of butter are the size of marbles. Add the cream, vanilla, and cold espresso and continue mixing until the dough just comes together. Pat the dough onto an ungreased baking sheet into a round about 6 inches in diameter. Mix the 1 teaspoon brown sugar with the white sugar to make it "sprinkleable." Sprinkle the round lightly with the sugar and cut it into 8 triangles. Bake until firm but still springy, 40 to 50 min. Remove from the oven and cool. Cut into wedges along the lines.