Ingredients
Method
- Whisk together flour, baking powder, baking soda, and salt in a bowl.
- Beat butter and sugar until fluffy, then add eggs, vanilla, and sour cream.
- Mix in flour mixture until dough forms, wrap in plastic, and refrigerate 1 hour.
- Preheat oven to 350°F, roll dough to 1/4-inch thickness, and cut into shapes.
- Bake on parchment-lined sheets for 8-10 minutes — do not let them brown.
- Beat frosting ingredients together until light and fluffy, then spread on cooled cookies.
- Decorate with sprinkles if desired.
