These Christmas Sandwich Cookies are colorful with the fluffiest buttercream frosting sandwiched between two soft and chewy loaded with chocolate chips, M&M's and sprinkles.
Course Baked Good, Cookies, Dessert
Cuisine American, Traditional
Keyword Christmas Sandwich Cookies, Sandwich Cookies
Preheat the oven to 350°F. Line sheet trays with parchment paper, set aside.
In a medium-sized bowl, stir together the flour, cornstarch, baking soda, and salt, set aside.
In the body of a stand mixer with the paddle attachment, cream the butter with the granulated and brown sugar for 3 minutes until light and fluffy.
Add the eggs one at a time until fully mixed, stir in the vanilla.
Add the flour mixture to the bowl and slowly stir it in until combined. Scrape down the sides as needed.
Add the M&Ms and chocolate chips, and stir to combine.
Add the sprinkles and stir to combine.
Take 2 tablespoons of the dough and roll it into a ball; make them so they are a little bit taller than wide, in a spherical shape to avoid too much spread. Continue with all the dough.
Bake for 11-12 minutes until lightly golden brown along the edge and the tops appear dry. Do not overbake.
When they come out of the oven, press more M&M’s, chocolate chips, and sprinkles into the dough for a pretty presentation if desired. Let cool for 10 minutes on the sheet tray, then transfer to a wire rack to cool completely.
While the cookies are baking, make the filling. Cream the butter in the body of a stand mixer with the paddle attachment until smooth.
Add the powdered sugar a little at a time until fully mixed in. Add the salt, vanilla, and milk. Stir to combine, then place on medium-high speed for 3 minutes until fluffy.
Divide the frosting evenly between 3 bowls. Add red food coloring to one bowl and green food coloring to another bowl, and stir to combine until you reach your desired color. Leave the last bowl as is.
Place the frosting in three piping bags or into three plastic bags and snip off the end. Pipe a dollop of each color onto the bottom of half of the cookies. Place another cookie on top and gently press down to form a sandwich. Serve immediately.