Cookie Dough:

• 1 1/2 sticks (3/4 cup) salted butter, at room temperature
• 3/4 cup packed light brown sugar
• 1 tablespoon hazelnut liquor (optional)
• 2 teaspoons vanilla extract
• 1 egg, at room temperature
• 2 cups all-purpose flour, plus an additional 2-4 tablespoons if needed
• 1/2 teaspoon baking soda
• 1/2 teaspoon kosher salt

Vanilla Frosting:

• • 2 cups powdered sugar
  • Assorted sprinkles, vanilla sugar, and/or sanding sugar, for decorating

Vanilla Buttercream:

• • 1 stick (8 tablespoons) salted butter, at room temperature
  • 2 ounces cream cheese, at room temperature (optional)
  • 1 1/2 cups powdered sugar