In a medium bowl whisk together the flour, salt, baking soda and baking powder.
In the stand mixer or large bowl beat the butter and vanilla until creamy 1-2 minutes, add the sugar and beat another 2 minutes. Beat in the egg, then vanilla. Add the dry ingredients in 4 additions beating in between each addition.
Cover the dough and refrigerate for 1-2 hours or until firm. Divide the dough in half and form into 2 logs (6 inches / 16 cm long). At this point you can roll the logs in chopped nuts, coconut, mini chocolate chips or even sprinkles if you want, wrap in plastic and freeze for 2-3 hours or refrigerate for 8 hours or over night.
Pre-heat oven to 350F/180C. Line baking sheets with parchment paper.
Slice the logs into ¼" thick round slices, place them on the prepared baking sheets, 1½ inches apart. Bake for approximately 8-10 minutes or until just starting to brown. Cool 10 minutes on the baking sheets then move to a wire rack to cool completely before serving. Dust with powdered sugar if desired. Enjoy!
Notes
If your dough is too wet then add a bit more flour, too dry then add a little milk. I made one log 6 inches and two around 4 inches (the cookies were smaller).
How to store the Yogurt cookies?
Keep cooled cookies in an airtight container at room temperature for up to 4 days. They stay soft and tender and are easy to grab for a quick treat. Or, once cooled, place the yogurt cookies in a freezer-safe container or bag and freeze for up to 3 months. Thaw at room temperature before serving.