Stir together the streusel dry ingredients.
Mix in the melted butter until large crumbs form.
Cream the butter and sugar.
Beat in the eggs.
Mix in the dries just until combined.
Scoop dough balls and coat cinnamon sugar.
Use your thumb to create a depression in each cookie.
Pile the streusel high in the center and on top the cookie.
Bake until puffed, cracked and fully set.
Mix glaze ingredients until smooth and drizzle back and forth on cookies. Share and enjoy!