Preheat oven to 350°F. Line two cookie sheets with parchment paper or silicone baking mats.

Scoop 1 or 2 tablespoon sized balls of cookie dough onto cookie sheets. Flatten slightly with the palm of your hand. Bake until the edges just turn brown and tops are just no longer translucent (2 tablespoon sized cookies: 10-14 minutes, 1 tablespoon sized cookies: 8-12 minutes). Cool completely before removing from cookie sheets. Store in an airtight container for up to 3 days or freeze for up to one month.

For M&M Shortbread Cookies: add M&Ms on top of the cookie dough ball before baking. For 2 tablespoon sized cookies, I suggest using 5-6 plain M&Ms, any color.

For Chocolate Dipped Shortbread Cookies: melt 4 ounces of white or semi-sweet baking chocolate according to package directions. Dip cooled cookies halfway into chocolate, tapping off the excess, and then place on a wax paper lined cookie sheet and chill until hardened. Sprinkle with crushed candy canes, toffee bits, nuts, or sprinkles while still wet, if desired.

For Thumbprint Cookies: make 1 tablespoon sized balls of cookie dough. Roll them between your hands to form a ball. Use the back of a wooden spoon to slightly make an indent in the center of each cookie. Bake until lightly golden on the bottom (8-12 minutes) and then re-press hole with the wooden spoon handle as needed. Cool completely. For filling, fill with about 1/2 teaspoon of jam, cold hot fudge ice cream topping, or cold caramel ice cream topping. If desired, melt some dark or white baking chocolate to drizzle over the top.