Sprinkle Cookies Supreme

Bahan-bahan (30 porsi)

• 1 cup (16 Tbsp; 226g) unsalted butter, softened to room temperature
• 1 and 1/2 cups (300g) granulated sugar
• 1 egg + 1 egg yolk, at room temperature
• 2 teaspoons pure vanilla extract
• 3 cups (375g) all-purpose flour (spooned & leveled)
• 1 and 1/4 teaspoons baking soda
• 1/2 teaspoon cream of tartar*
• 1 teaspoon cornstarch
• 1/2 teaspoon salt
• 1 cup sprinkles, plus more for decor on top of frosting*
• 3/4 cup (12 Tbsp; 170g) unsalted butter, softened to room temperature
• 2 and 1/4 cups (270g) confectioners’ sugar
• 3 Tablespoons (45ml) heavy cream or half-and-half*
• 1 teaspoon pure vanilla extract
• 1/8 teaspoon salt