These soft, pillowy cinnamon roll cookies will surely be your new obsession. They are swirled with cinnamon sugar and drizzled with a simple icing.
Preheat the oven to 350 degrees. Line a baking sheet with a silicone baking mat or parchment paper.
To a large mixing bowl, use a handheld mixer to cream together sugars and butter until smooth. Mix in applesauce and vanilla. Add flour, baking soda, cream of tartar, and salt. Combine until a soft dough forms. Form dough into a smooth ball and place on top of a piece of parchment paper. Using a rolling pin, roll into a 10x11" rectangle.
Make the cinnamon sugar filling by combining all ingredients in a small bowl until a smooth paste forms. Spread filling into the middle third of the rectangle. Take the edges of the parchment paper to prevent sticking and roll dough into a tight log. Cut into 1" portions. Roll each portion into a smooth ball then place on the prepared baking sheet. Bake for 15 minutes. Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire cooling rack.
Once cookies have cooled, drizzle with icing (powdered sugar + water until desired consistency).