cut-out cookies — Les Petites Gourmettes

Ingredients

• 3 cups flour
• 1 teaspoon baking powder
• 1/2 teaspoon salt
• 1 cup (2 sticks) unsalted butter, room temperature
• 1 cup sugar
• 1 large egg
• 2 tablespoons sour cream
• 1 teaspoon vanilla extract
• Additional sugar for rolling dough
• 6 cups powdered sugar
• 1/4 cup milk
• 1/2 teaspoon vanilla extract
• Food coloring
• Colored sugar crystals, sprinkles, and other candy décor