Add the granulated sugar and beat for 2-3 minutes.
Beat in the egg, vanilla extract, and peppermint extract for 1-2 minutes.
In a separate bowl, combine the flour, baking soda, and salt. Mix until combined, scraping down the sides of the bowl as needed.
Stir in the crushed candy canes and red gel paste food coloring.
Use a #40 dough scoop (about two tablespoons) to scoop balls of cookie dough onto a parchment-covered baking sheet with at least two inches between cookie dough balls.
Bake at 350˚F for 8-10 minutes.
Repeat with the remaining dough, allowing the baking sheets to cool between batches.
Allow the cookies to cool. Then, frost with peppermint buttercream frosting and sprinkle with crushed candy canes.
Fluffy Peppermint Buttercream
Beat the softened butter and shortening until smooth.
Add the marshmallow cream and beat well.
Slowly mix in half of the powdered sugar, about 1/2 cup at a time.
Mix in the peppermint extract, vanilla extract and milk.
Slowly mix in the remaining half of the powdered sugar, about 1/2 cup at a time.
Beat the buttercream until smooth.
Notes
Peppermint Whoopie Pie
Spread frosting on the bottom of one cookie and top it with another cookie, sandwiching the frosting between them. Add sprinkles (or crushed candy canes) to the visible frosting.
Storage
Store cooled cookies (including ones with frosting) in an airtight container in the fridge for 3-4 days or in the freezer for up to four weeks. Layer frosted cookies with parchment paper.