Preheat the oven to 350 degrees. Line 3 baking sheets with parchment paper.
Sift together the flour, baking powder, and salt and set aside.
In the top of a double boiler, over simmering water, melt the chocolate and butter together. Remove from the heat as soon as the chocolate is melted.
With an electric mixer, beat together the egg, sugar, vanilla, and coffee. Beat on high speed for four minutes.
On low speed, gradually add the chocolate mixer. Then, add the flour, and beat on low just until no streaks remain.
Drop the batter, which will be loose, in one tablespoon amounts. Make sure each drop is in a round circle, and that they're all about the same size.
Bake one sheet at a time for 12 minutes each. Cool on a wire rack.
When the cookies are cool, make sandwiches with small scoops of ice cream. Roll in the sprinkles. Freeze until firm, for about two hours.