2 1/2 cups all-purpose flour, 1/4 teaspoon baking powder, 1/4 teaspoon fine salt, 3/4 cup white sugar, 3/4 cup unsalted butter (cut into small pieces, at room temperature), 1 large egg (lightly beaten), 1 teaspoon pure vanilla extract, ½ cup holiday sprinkles (plus extra for decorating), 4 cups confectioners' sugar, 1/4 cup meringue powder, Food coloring (optional), Decorating sugar (for topping, optional), Sprinkles (for topping, optional)

2 and 1/4 cups (281g) all-purpose flour (spooned and leveled), plus more as needed for rolling and work surface, 1/2 teaspoon baking powder, 1/4 teaspoon salt, 3/4 cup (12 Tbsp; 170g) unsalted butter, softened to room temperature, 3/4 cup (150g) granulated sugar, 1 large egg, at room temperature, 2 teaspoons pure vanilla extract, 1/4 or 1/2 teaspoon almond extract (optional, but makes the flavor outstanding)*, 3 cups (360g) confectioners’ sugar, 1/2 teaspoon pure vanilla extract (omit and replace with water for stark white icing), 2 teaspoons light corn syrup*, 4.5–5 Tablespoons (67–75ml) room temperature water, pinch salt*, optional: gel food coloring & sprinkles for decorating

225g / 1 cup unsalted butter (, softened (or use salted, skip salt)), 1 cup caster/superfine sugar ((granulated/ordinary white sugar ok too)), 1 1/2 tsp vanilla extract, 1 large egg ((55-60g / 1.9-2oz)), 3 cups flour (, plain / all purpose), 3/4 tsp baking powder, 3/4 tsp salt, Icing for Sugar Cookies

1½ cups plus one tablespoon all purpose flour (see note), 1 teaspoon baking powder, ½ teaspoon baking soda, ¼ teaspoon salt, ½ cup unsalted butter (softened but still cool), ½ cup granulated sugar, ⅓ cup brown sugar (lightly packed, make sure it's fresh and soft), 1 large egg, 2 teaspoons pure vanilla extract, 1½ cups M&M's or a mixture of M&M's and chocolate chips (divided), ¼ cup holiday sprinkles

8 tablespoons (1 stick) unsalted butter, at room temperature, 3 large eggs, at room temperature, 2 1/4 cups all-purpose flour, 2 teaspoons baking powder, 1/2 cup granulated sugar, 1/2 teaspoon kosher salt, 2 teaspoons almond extract, 1 1/3 cups powdered sugar, 3 tablespoons milk, any fat percentage, 1/2 teaspoon almond extract, 1/4 teaspoon kosher salt, 2 tablespoons nonpareils

3.75 cups all-purpose flour, 1 teaspoon baking powder, 0.5 teaspoon salt, 1.5 cups white sugar, 1 cup margarine, softened, 2 eggs, 2 teaspoons vanilla extract