Start by adding your flour, salt, and baking soda to a bowl. Whisk together and set aside.
In a large bowl cream together your butter, sugar, and brown sugar. Add in your vanilla and eggs. Beat until smooth.
Slowly add your flour mixture, until fully combined. Mixing as you add.
Fold your Christmas Tree Cakes into the dough. Until all ingredients are well combined.
Chill dough for one hour before baking to prevent over spreading.
Using your cookie dough scoop, drop dough onto a cookie sheet. Bake at 375 degrees for 9 minutes or until cookies are slightly golden. Let cool.
Ice each cookie with white frosting. Using your piping bag and tip. Top each one with red lines, using the cookie icing, and green sanding sugar.
Serve and enjoy! Christmas Tree Cakes, meet cookie!