date:Aug 15, 2013
am the sugar and butter together in a large bowl. Add the whole egg, then the egg yolk, allowing each to blend into the butter mixture before adding the next.
4. Stir sour cream, vanilla, lemon peel, and lemon extract into the sugar mixture until well combined. Add flour mixture to sour cream mixture and stir until just moistened. Spoon batter into prepared muffin cups, filling each cup about 3/4 full.
5. Bake in the preheated oven until golden and the tops spring back when lightly pressed, abou