Cream together the sugar and cold butter. I know that usually I say room temperature butter, but trust me here, you want cold butter.
Add the egg, extracts, and vanilla bean seeds.
See the pretty black specks?
Add the flour and baking powder. Mix until just combined. Make sure that you scrape the bowl.
Turn the dough out onto a floured surface. The dough is going to be crumbly, so knead it together.
Roll the dough out and cut out into shapes. Put the shapes on a parchment lined baking sheet and put in the freezer for 5 to 10 minutes.
Bake the cookies in a 350 degree oven for 10 to 12 minutes. Cool completely before icing.
Make the glaze. Whisk all ingredients together.
I outline the shape that I want to make and then flood the icing to fill it.
Let the cookies dry overnight. I know that you are going to be tempted to not do this step, they will look dry, but they will not be. I have ruined a few cookies in my day by not being patient. And hungry.