Mash together cinnamon Roll Crumble until crumbly. I like to use a slotted serving spoon since I don't have a pastry cutter. Refrigerate after preparing.
In a separate bowl - Mix cookie base until smooth and creamy. Add milk until desired spreading consistency.
In a greased 9X13 pan press 1/3 of the sugar cookie dough into the bottom. Spread Cinnamon Roll Crumble onto that layer. Then carefully press the remaining 2/3 of the sugar cookie dough on top of the Cinnamon Roll Crumble layer. Bake at 350 degrees for 30 minutes. The edges will be golden and the top will mostly be blonde. Cool completely.
Frosting:Mix until uniform and spread on Cinnamon Roll Sugar Cookie.