1Beat butter & sugar for about 3 minutes with an electric mixer, or until fluffy.
Add egg and vanilla and beat 1 minute more.
2Mix dry ingredients in a bowl.
Add gradually to the butter mixture, making sure not to beat too much and stir in cherries by hand.
3Divide the dough into thirds; roll each into a log.
Cover in waxed paper or parchment paper, then plastic wrap.
Chill overnight or freeze until ready to use, for up to a month (be sure to thaw out if frozen).
4When ready to bake, preheat oven to 375 degrees. Slice into ¼” slices and bake 375 10 minutes, until barely brown.
Store wrapped in refrigerator or freeze until ready to thaw and slice.