Preheat oven to 350°F. Grease a baking sheet and set it aside.
Beat butter in a large bowl with an electric mixer for 30 seconds. Add 1-1/4 cups sugar and vanilla; beat until fluffy. Add eggs; beat well.
Stir together flour, baking soda and salt in a separate mixing bowl. Add to beaten mixture alternately with buttermilk.
Drop by rounded teaspoons onto the prepared baking sheet. Sprinkle with sugar, if desired.
Bake for 10-12 minutes or until lightly browned on the edges.
Allow to cool for 2-3 minutes, then remove to wire racks to cool completely.
Notes
Although these cakes are great as written, sometimes options to change them up are also great. You can top these cakes with your favorite glaze. Try adding cinnamon, nutmeg, lemon zest to the batter. Or, add some pecans to the batter. Or maybe a sprinkle of powdered sugar over the top.
No buttermilk? You can substitute sour cream or plain yogurt in its place. Or quickly make your own buttermilk by combining 1 cup of milk with 1 tablespoon of lemon juice or distilled vinegar. Let it sit for about 5 minutes before using it.