These were made by separating the dough in 2, dying one blue. then i rolled out a log shape of each. After being in the freezer enough to firm up, the logs were cut down the middle, length wise. A half of each makes a 2-colored log, which is pressed together & refroze. Once firm, slice &bake.
I split my sugar cookie dough into 3 equal parts. In a deep dish lined with parchment paper, I flattened the dough in layers. A hour in the fridge helped it firm up so it was easier to work with. I ended up rolling it out a little to keep the cookie thin.
Blue & white cupcakes, w/ sugar detail.